Mathematics High School

## Answers

**Answer 1**

The** minimum value** of f(x) = |x + 3| + x^3 over the interval x ∈ [-2,6] is 2√(3) - 10/3, which occurs at x = -√(1/3) and x = √(1/3).

To minimize the** function** f(x), we need to find the value of x that makes f(x) as small as possible while satisfying the constraint x ∈ [-2, 6].

Let's first analyze the function f(x) and break it down into two cases

Case 1: x ≤ -3

In this case, |x+3| = -(x+3), so we can rewrite f(x) as:

f(x) = -(x+3) + x^3 = x^3 - x - 3

Case 2: x > -3

In this case, |x+3| = x+3, so we can rewrite f(x) as:

f(x) = x+3 + x^3 = x^3 + x + 3

Now, let's find the** critical points** of f(x) by taking its derivative:

f'(x) = 3x^2 - 1 (for x ≤ -3)

f'(x) = 3x^2 + 1 (for x > -3)

To find the critical points, we need to set f'(x) to zero and solve for x:

For x ≤ -3:

3x^2 - 1 = 0

x^2 = 1/3

x = ±√(1/3)

For x > -3:

3x^2 + 1 = 0

x^2 = -1/3, which has no **real solutions**.

Therefore, the critical points are x = -√(1/3) and x = √(1/3) for x ≤ -3. We now need to evaluate f(x) at these critical points and at the endpoints of the interval [-2, 6]

f(-2) = |-2 + 3| + (-2)^3 = 6

f(6) = |6 + 3| + 6^3 = 252

f(-√(1/3)) = |-√(1/3) + 3| + (-√(1/3))^3 = 2√(3) - 10/3

f(√(1/3)) = |√(1/3) + 3| + (√(1/3))^3 = 2√(3) + 10/3

Learn more about** function** here

brainly.com/question/30596924

#SPJ4

The given question is incomplete, the complete question is:

Minimize f(x)= |x + 3| + x^3 s.t. x∈ [-2,6]

## Related Questions

find a 90onfidence interval for y when x = 69. (round your answers to one decimal place.)

### Answers

the 90% **confidence interval **for y when x = 69 is (41.5, 52.3). This means that we are 90% confident that the true value of y is between 41.5 and 52.3 when x = 69.

To find the 90% confidence interval for y when x = 69, we need to use regression analysis. First, we need to fit a regression model to the data and obtain the** regression equation**. Once we have the regression equation, we can plug in the value of x = 69 and get the predicted value of y.

Assuming that we have already performed the regression analysis, let's say the regression equation is:

y = 4.5 + 0.6x

To find the predicted value of y when x = 69, we simply plug in x = 69 into the equation:

y = 4.5 + 0.6(69)

y = 46.9

So, the predicted value of y when x = 69 is 46.9.

To find the 90% confidence interval for this predicted value, we need to use the standard error of the estimate (SEE) and the **t-distribution.** The formula for the confidence interval is:

y ± t(0.05/2, n-2) x SEE

where y is the predicted value of y, t(0.05/2, n-2) is the critical value of the t-distribution for a 90% confidence level with n-2 degrees of freedom (n is the sample size), and SEE is the standard error of the estimate.

Let's say that the SEE is 3.2 (we obtain this value from the regression output) and the sample size is n = 50. Using a t-distribution table, we find that the critical value for t(0.05/2, 48) is 1.677.

Plugging in the values, we get:

46.9 ± 1.677 x 3.2

46.9 ± 5.4

(41.5, 52.3)

So, the 90% confidence interval for y when x = 69 is (41.5, 52.3). This means that we are 90% confident that the true value of y is between 41.5 and 52.3 when x = 69.

To provide a 90% confidence interval for y when x = 69, we need more information such as the regression equation, the standard error, and the **critical value. **Once you have this information, you can calculate the lower and upper bounds of the confidence interval. Please provide the necessary details, and I'll be happy to help you find the 90% confidence interval.

To know more about **confidence interval **click here:

brainly.com/question/24131141

**#SPJ11**

by comparing areas, show that ln(2) < 1 < ln(3).

### Answers

The **areas **under the curve y = 1/x between x = 1 and x = 2, x = 2 and x = 3, and x = 1 and x = 3. Concludes that ln(2) < 1 < ln(3) based on the comparison of these areas.

How to conclude ln(2) < 1 < ln(3)?

We can use the fact that the **natural logarithm function** is strictly increasing to compare the values of ln(2), 1, and ln(3).

Consider the area under the curve y = 1/x between x = 1 and x = 2, x = 2 and x = 3, and x = 1 and x = 3. We can approximate these areas using **rectangles **with a width of 1 and a height equal to the value of the function at the left endpoint of the interval.

For the area under the curve between x = 1 and x = 2, we have:

Area ≈ base × height = 1 × 1/2 = 1/2

For the area under the curve between x = 2 and x = 3, we have:

Area ≈ base × height = 1 × 1/3 ≈ 1/3

For the area under the **curve **between x = 1 and x = 3, we have:

Area ≈ (base of first rectangle + base of second rectangle) × height≈ 1 × 1/2 + 1 × 1/3≈ 5/6

Using the properties of the natural logarithm, we can see that:

ln(2) = Area under the curve between x = 1 and x = 2< Area under the curve between x = 1 and x = 3< 1 < Area under the curve between x = 2 and x = 3< ln(3)

Therefore, we have:

ln(2) < 1 < ln(3)

as desired.

Learn more about **natural logarithm function**

brainly.com/question/31390864

**#SPJ11**

Select the correct answer. Circle C has a center at (-2,10) and contains the point P(10,5). Which equation represents circle C? A. (x − 2)2 + (y + 10)2 = 13 B. (x − 2)2 + (y + 10)2 = 169 C. (x + 2)2 + (y − 10)2 = 13 D. (x + 2)2 + (y − 10)2 = 169

### Answers

The **equation **for the **circle **described is:

(x + 2)² + (y - 10)² = 169

How to find the equation of the circle?

For a **circle **whose center is at (a, b) and has a **radius **of R units, the equation can be written as:

(x - a)² + (y - b)² = R²

Here we know that the center is at (-2, 10), and the circle contains the point (10, 5), then the radius of the circle is:

R = √( (-2 - 10)² + (10 - 5)²)

R = √( 144 + 25)

R= √169

Then the equation for the circle is:

(x + 2)² + (y - 10)² = 169

Learn more about **circles **at:

https://brainly.com/question/1559324

#SPJ1

Helppppppppp!!!!!

Which pair is at the same level of structural organization?

### Answers

S and X are the poair at the same** structural organization**

What is structural organization in humans and plants

**Structurаl orgаnizаtio**n in humаns аnd plаnts refers tо thе hierаrсhy оf biologicаl structures аnd systems thаt mаkе up thеse orgаnisms. Bоth humаns аnd plаnts еxhibit levels оf orgаnizаtion, stаrting frоm thе bаsic building blocks (аtоms аnd mоlecules) tо thе complеx orgаn systems in humаns аnd рlаnt structures. Нere's а brief compаrison оf structurаl orgаnizаtion in humаns аnd plаnts:

Atоms аnd mоlecules: Тhe **bаsic building** blocks оf аll living orgаnisms, аtоms сombine tо form mоlecules, whiсh furthеr сombine tо form more complеx structures.

Cells: Тhe **fundаmentаl unit **оf life. In both humаns аnd plаnts, сells cаrry оut essentiаl functions аnd cоme in diffеrеnt typеs, eаch with speсifiс roles.

Read more on **structural organization **here https://brainly.com/question/24940332

#SPJ1

Consider the following equation of a quadric surface. z = x2 + 289y2 a. Find the intercepts with the three coordinate axes, if they exist. b. Find the equations of the xy-, xz-, and yz-traces, if they exist. c. Sketch a graph of the surface. a. Find the x-intercepts, if they exist. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The x-intercept(s) is/are located at x = (Use a comma to separate answers as needed.) B. There are no x-intercepts.

### Answers

The** intercepts** are at the origin (0, 0, 0) and the graph is an **elliptical paraboloid** opening upwards with its vertex at the o**rigin (0, 0, 0).**

a. To find the **intercepts** with the three **coordinate **axes, we can set the other two **variables **to zero in the given equation.

x-intercepts:

Set y = 0 and z = 0:

[tex]0 = x^2 + 289(0)[/tex]

x^2 = 0

x = 0

y-intercepts:

Set x = 0 and z = 0:

[tex]0 = (0)^2 + 289y^2[/tex]

[tex]y^2 = 0[/tex]

y = 0

z-intercepts:

Set x = 0 and y = 0:

[tex]z = (0)^2 + 289(0)[/tex]

z = 0

The intercepts are at the **origin **(0, 0, 0).

b. To find the **equations **of the xy-, xz-, and yz-traces, we can set one of the variables to zero in the given equation.

xy-trace (z = 0):

[tex]0 = x^2 + 289y^2[/tex]

xz-trace (y = 0):

[tex]z = x^2 + 289(0)[/tex]

[tex]z = x^2[/tex]

yz-trace (x = 0):

[tex]z = (0)^2 + 289y^2[/tex]

[tex]z = 289y^2[/tex]

c. To sketch a **graph **of the surface, note that the given equation is a **quadric surface **of the form z = x^2 + 289y^2, which represents an **elliptical paraboloid**. Since the coefficients of x^2 and y^2 are both positive, the paraboloid opens upwards.

In summary:

a. The x-intercept is located at x = 0.

b. The equations of the traces are:

[tex]xy-trace: 0 = x^2 + 289y^2[/tex]

- xz-trace[tex]: z = x^2[/tex]

- yz-trace:[tex]z = 289y^2[/tex]

c. The graph is an elliptical paraboloid opening upwards with its vertex at the origin (0, 0, 0).

To know more about **elliptical paraboloid** refer here:

https://brainly.com/question/10992563

#SPJ11

need help fast please

### Answers

80 degree +(6x-6)+(7+3x)=180degree

80 degree +9x+1=180 degree

81 degree + 9x = 180 degree

9x=180 degree -81 degree

9x=99 degree

x= 11 degree

For 7+3x

7+3x11

7+33

=40

So that the measure of

**Answer:**

[tex]\large\boxed{\tt m \angle A = 40^{\circ}.}[/tex]

**Step-by-step explanation:**

[tex]\textsf{We are asked to identify} \ \tt m \angle A. \ \textsf{We are given a diagram which tells us the shape}[/tex]

[tex]\textsf{is a Triangle.}[/tex]

[tex]\large\underline{\textsf{What is a Triangle?}}[/tex]

[tex]\textsf{A Triangle is a 2D Shape that has 3 sides and 3 angles. We know this since}[/tex]

[tex]\textsf{Triangle begins with "Tri" which means 3, hence there's 3 sides that make up 3}[/tex]

[tex]\textsf{angles. The Sum of the 3 angles is equal to 180}^{\circ}. \ \textsf{This means that Triangle can}[/tex]

[tex]\textsf{have many unique differences with its angles, making it an entirely different}[/tex]

[tex]\textsf{Triangle.}[/tex]

[tex]\textsf{We know that the angles' measures add up to 180}^{\circ}. \ \textsf{We can now form an equation.}[/tex]

[tex]\tt 180^{\circ} = m \angle A + m \angle B + m \angle C[/tex]

[tex]\underline{\textsf{Substitute what's given;}}[/tex]

[tex]\tt 180^{\circ} = 80^{\circ} + 7 + 3x + 6x - 6.[/tex]

[tex]\large\underline{\textsf{Solving;}}[/tex]

[tex]\textsf{We identified our equation, now we are ready to solve for x. Remember that x}[/tex]

[tex]\textsf{isn't given to us, which means that we have to identify x, then substitute the}[/tex]

[tex]\textsf{value in to find m} \tt \angle A.[/tex]

[tex]\underline{\textsf{Combine All Like Terms;}}[/tex]

[tex]\tt 180^{\circ} = \boxed{\tt 80^{\circ}} + \boxed{\tt 7} + 3x + 6x \boxed{\tt- 6}[/tex]

[tex]\tt 180^{\circ} = 81^{\circ} + \boxed{\tt 3x} + \boxed{\tt6x}[/tex]

[tex]\tt 180^{\circ} = 81^{\circ} + 9x[/tex]

[tex]\textsf{Now, let's use the Subtraction Property of Equality which states that whenever}[/tex]

[tex]\textsf{2 equal expressions are subtracted by the same term, they're still equal.}[/tex]

[tex]\underline{\textsf{Subtract 81 from both sides using the Subtraction Property of Equality;}}[/tex]

[tex]\tt 180^{\circ} - 81^{\circ} = 81^{\circ} - 81^{\circ}+ 9x[/tex]

[tex]\tt 99^{\circ} = 9x[/tex]

[tex]\textsf{Let's now use the Division Property of Equality, but for dividing by the same term.}[/tex]

[tex]\underline{\textsf{Divide 9 from both sides using the Division Property of Equality;}}[/tex]

[tex]\tt \frac{99^{\circ}}{9} = \frac{9x}{9}[/tex]

[tex]\large\boxed{\tt x = 11}[/tex]

[tex]\textsf{Now that we know the value of x, we are able to find m} \tt \angle A.[/tex]

[tex]\underline{\textsf{Substitute;}}[/tex]

[tex]\tt m \angle A = 7+3(11)[/tex]

[tex]\underline{\textsf{Evaluate;}}[/tex]

[tex]\large\boxed{\tt m \angle A = 40^{\circ}.}[/tex]

8. A homebuilder is putting new shelves in each closet he is building. He has 2,592 shelves in

his Inventory. If each closet needs 108 shelves, how many closets can he build?

2.4

108

42

24

### Answers

It’s 108 your answer

WILL GIVE BRINLIEST!!!!!!!!!!!!!!!!!!!!! WHAT IS LONG DIVISION?

### Answers

Long division is a method of dividing two numbers that involves writing out the division problem in a step-by-step process, using repeated subtraction and multiplication to find the quotient and remainder.

To perform long division, the dividend (the number being divided) is written on top of the division symbol, with the divisor (the number doing the dividing) written below it. The goal is to divide the dividend by the divisor, and write the quotient (the answer) above the division symbol, with any remainder written to the right of the quotient.

The steps involved in long division include:

Divide: Determine how many times the divisor can be subtracted from the first digit (or digits) of the dividend, and write this above the division symbol as the first digit(s) of the quotient.

Multiply: Multiply the quotient digit(s) by the divisor, and write the result below the corresponding digits of the dividend.

Subtract: Subtract the product from the previous step from the dividend, and write the result below the line.

Bring down: Bring down the next digit of the dividend (if any) and write it next to the result from the previous step.

Repeat: Repeat the process until there are no more digits to bring down, and the remainder (if any) is less than the divisor.

Long division can be used to divide any two numbers, including decimals and fractions. It is an important skill in mathematics, and is often used in algebra and other advanced math courses.

Brainliest?

**Answer:**

when normaldivision doesnt work do this

**Step-by-step explanation:**

truse me it works everytime

Question 1 Let the random variable Z follow a standard normal distribution. Find the following probabilities. a) (5 points) P(Z31.72). b) (5 points) P(Z>1.1). c) (5 points) P(1.1 1070) b) (15 points) P(990 < 5 1150) Question 4 (25 points) Determine the probability that in a sample of 100 the sample proportion is less than 0.77 if p=0.8.

### Answers

By answering the presented question, we may conclude that P(990< X <1150) = **normal distribution **P[(990-1000)/100 < Z < (1150-1000)/100] = P(-1.0 < Z < 1.5) = 0.7745

what is normal distribution?

The normal distribution is an example of a continuous **probability **distribution, in which the majority of data points cluster at the middle of the range and the remaining ones drop symmetrically towards one of the extremes. The mean of the distribution is another term for the range's centre. According to the normal distribution, also known as the **Gaussian **distribution, which is symmetrical around the mean, data that are close to the mean are more frequent than data that are far from the mean. I'm utilising heuristics in normal distribution to obtain a student's SAT scores from a new exam prep course. The data exhibit a normal distribution with a mean (M) of 1150 and a **standard deviation **(SD) of 150.

Question 1:

a) P(Z<1.72) = 0.9582 (using standard normal distribution table or calculator)

b) P(Z>1.1) = 0.1357

c) P(1.1<Z<1.70) = 0.0808

Question 2:

a) P(X<1070) = P(Z<(1070-1000)/100) = P(Z<0.7) = 0.7580

b) P(990< X <1150) = P[(990-1000)/100 < Z < (1150-1000)/100] = P(-1.0 < Z < 1.5) = 0.7745

To know more about **normal distribution **visit:

https://brainly.com/question/29509087

#SPJ1

a binomial distribution has 12 trials and a probability of success of 0.4. calculate the variance for this distribution.

### Answers

The variance for a **binomial distribution** with 12 trials and a probability of success of 0.4 can be calculated using the formula: variance = n * p * (1 - p), where n is the number of trials and p is the probability of success.

In this case, n = 12 and p = 0.4, so the variance can be calculated as:

variance = 12 * 0.4 * (1 - 0.4)

= 12 * 0.4 * 0.6

= 2.88

Therefore, the **variance** for this binomial distribution is 2.88.

The variance is a measure of how spread out the data is in a **distribution**. In the context of a binomial distribution, the variance measures the variability of the number of successful outcomes across the 12 trials. A larger variance indicates a wider spread of data, while a smaller variance indicates a narrower spread.

It's worth noting that the **standard deviation** can also be calculated from the variance by taking the square root of the variance. In this case, the standard deviation would be:

standard deviation = sqrt(variance)

= sqrt(2.88)

= 1.697

The standard deviation is another measure of the spread of data, and it provides a useful way to compare the variability of different distributions.

To learn more about **Binomial distribution**, visit:

https://brainly.com/question/29137961

#SPJ11

Can someone please help me with my math homework please!!!

### Answers

Answer:11

Step-by-step explanation:

(Chapter 13) The curve r(t)= <0, t^2, 4t> is a parabola

### Answers

We can see that the first component of the vector equation is always zero, so the **parabola **lies in the xz-plane.

Moreover, the second component is a quadratic function of t, which gives us a vertical **parabola **when plotted in the yz-plane. The third component is a linear function of t, so the curve **extends **infinitely in both directions. Therefore, we have a vertical parabola in the xz-plane.

This statement is referring to a specific vector-valued function, which we can write as:

f(t) = (0, t^2, ct)

where c is a constant.

The second component of this vector function is t^2, which is a quadratic function of t. When we plot this function in the yz-plane (i.e., we plot y = t^2 and z = 0), we get a vertical parabola that opens upward. This is because as t increases, the value of t^2 increases more and more quickly, causing the curve to curve upward.

The third component of the vector function is ct, which is a linear function of t. When we plot this function in the xz-plane (i.e., we plot x = 0 and z = ct), we get a straight line that extends infinitely in both directions. This is because as t increases or decreases, the value of ct increases or decreases proportionally, causing the line to extend infinitely in both directions.

To know more about **parabola**,

https://brainly.com/question/28973830

#SPJ11

presents the results of a poll evaluating not supporting the war, reporting that 54% of adults between the ages of 30-50 are not supportive. If we wanted to estimate this number to within 1% with 90% confidence, what would be an appropriate sample size? (a) Calculate a 95% confidence interval for the difference between the proportion of adults older than 50 and the adults aged between 30-50, who do not support the attack (pD − pI), and interpret it in this context. We have already checked conditions for you

### Answers

A sample of size 683 is needed to estimate the 30-50 age group's war non-support proportion within 1% at a 90% **confidence level**. The 95% confidence interval for the difference between older adults and 30-50-year-olds who do not support the war is (0.033, 0.147).

Let p be the true proportion of adults aged between 30-50 who do not support the war. From the given information,

Margin of error (E) = 0.01

Confidence level (CL) = 0.90

Standard normal distribution **critical value **(Zα/2) = 1.645 (from a Z-table)

Using the formula for sample size calculation for proportions,

n = (Zα/2)² * p * (1-p) / E²

Since we don't know the true proportion p, we use the maximum possible value of 0.5 for p to get the most conservative estimate of the sample size.

n = (1.645)² * 0.5 * 0.5 / (0.01)² = 1074.31

Rounding up to the nearest **integer**, we get a minimum sample size of 1075.

To calculate the 95% confidence interval for the difference between the proportion of **adults** older than 50 and the adults aged between 30-50 who do not support the war, we can use a two-proportion z-test with a pooled sample proportion. We are given that the proportion of adults between 30-50 who do not support the war is 54%, but we don't have any information about the proportion of adults older than 50 who do not support the war. Let p₁ be the true proportion of adults between 30-50 who do not support the war, and p₂ be the true proportion of adults older than 50 who do not support the war.

We can estimate the pooled sample **proportion** as,

p = (x₁ + x₂) / (n₁ + n₂)

where x₁ is the number of adults between 30-50 who do not support the war, x₂ is the number of adults older than 50 who do not support the war, n₁ is the sample size of **adults** between 30-50, and n₂ is the sample size of adults older than 50.

Assuming that the sample **size** is sufficiently large, we can use the formula for the standard error of the difference between two proportions:

SE(p₁ - p₂) = √(p(1-p)(1/n₁ + 1/n₂))

The 95% **confidence** interval for the difference between the two proportions is then given by:

(p₁ - p₂) ± Zα/2 * SE(p₁ - p₂)

Substituting the given values,

p = 0.54

x₁ = 540 (assuming a sample size of 1000)

n₁ = 1000

n₂ = 1000

Zα/2 = 1.96 (from a Z-table)

SE(p₁ - p₂) = sqrt(0.540.46(1/1000 + 1/1000)) = 0.031

(p₁ - p₂) ± Zα/2 * SE(p₁ - p₂) = 0.00 ± 1.96 * 0.031 = (-0.06, 0.06)

To know more about **sample size**, here

brainly.com/question/30885988

#SPJ4

A unicycle is a simple connected graph which contains exactly one cycle. Find a formula (as a simple sum) for the number of unicycles on the set {1, ..., n} of labeled vertices.

### Answers

The number of unicycles on a labeled** set of vertices **{1, 2, ..., n} can be found using the formula: (1/2)(n-1)![(n-2)! - (n-3)! + (n-4)! - ... + [tex](-1)^{(n-1)}*1[/tex]!]

This formula is based on the fact that a unicycle can be formed by choosing any vertex as the **starting point,** and then arranging the remaining n-1 vertices in a cycle.

This can be done in (n-1)! ways. However, we must subtract the number of cases where there are disconnected components, which can occur when we exclude one or more edges from the cycle.

To do this, we can use the principle of **inclusion-exclusion.** The term (n-2)! represents the number of ways to arrange the remaining vertices in a cycle when one edge is excluded, and we subtract this from the total count.

However, we must add back the cases where **two edges** are excluded and there are two disconnected components. This is given by (n-3)!, and we continue this alternating pattern until we add back or subtract 1!, depending on whether n-1 is odd or even.

Thus, the final formula for the number of unicycles is given by the above expression.

To know more about** set of vertices, **refer here:

https://brainly.com/question/30507546#

#SPJ11

the ____ function tests whether a variable contains a numeric data type. a. is_number() c. is_numeric() b. is_digit()

### Answers

The is_number() **function** tests whether a variable or cell contains a numeric data type. So, correct option is A.

This function returns TRUE if the **argument** is a number and FALSE otherwise.

The is_numeric() function is not a standard function in most programming languages. However, some **programming** languages may have similar functions or methods to test for numeric data types.

On the other hand, the is_digit() function tests whether a character is a digit or not. This function returns TRUE if the character is a digit and **FALSE** otherwise.

This function can be useful in **scenarios** where you need to check if a character is a number, such as validating user input in a form. However, it only works for individual characters and does not test for numeric data types of variables or cells.

So, correct option is A.

To learn more about **function** click on,

https://brainly.com/question/29109186

#SPJ4

The Oakland Tribune ran a survey by asking readers to call in their response to this question: "Do you support the development of atomic weapons that could kill millions of innocent people?" It was reported that 20 readers responded and that 87% said "no," while 13% said "yes." Discuss the major flaws in this survey.

### Answers

These flaws make it difficult to draw valid** conclusions** from the survey results.

There are several major flaws in this survey:

Self-selection bias: The survey relied on readers to call in their responses, which means that only people who were motivated enough or had strong opinions on the issue would participate. This could lead to an over-representation of individuals who are strongly against atomic weapons, and the results may not be representative of the general **population**.

Sampling bias: The survey was conducted using a non-random sampling method, as only readers of the Oakland Tribune were surveyed. This means that the sample may not be representative of the entire population, and the results may not be generalizable to the wider population.

Loaded question: The question itself is biased and may influence respondents' answers. The question includes the statement "that could kill millions of innocent people," which could **influence** respondents to answer in a certain way, regardless of their true opinions on atomic weapons.

Lack of control: There is no information provided on how the survey was **administered**, how responses were recorded, or how the data was analyzed. This lack of control means that the survey results may not be accurate or reliable.

In summary, the major flaws in this survey include self-selection bias, sampling bias, a loaded question, and lack of control. These flaws make it difficult to draw valid conclusions from the survey **results**.

To learn more about **administered** visit:

https://brainly.com/question/28321763

#SPJ11

Convert these integers from binary notation to decimal notation. a. 1 1111 b. 1 0101 0101 c. 10 0000 0001 Convert these integers from hexadecimal notation to binary notation. a. 80E b. ABBA c. 135AB Convert (7345321): to binary expansion and (10 1011 1011)2 to its octal expansion. Use Euclidean algorithm to find the god of the following: a. 12, 18 b. 1001, 1331 c. 1000, 5040 d. 111, 201 e. 12345, 54321

### Answers

To convert the** binary numbers **to decimal:

a. 11111 (binary) = 1(2⁴) + 1(2³) + 1(2²) + 1(2¹) + 1(2⁰) = 31 (decimal)

b. 101010101 (binary) = 341 (decimal)

c. 100000001 (binary) = 257 (decimal)

To convert the **hexadecimal numbers **to binary:

a. 80E (hex) = 1000 0000 1110 (binary)

b. ABBA (hex) = 1010 1011 1011 1010 (binary)

c. 135AB (hex) = 0001 0011 0101 1010 1011 (binary)

To convert 7345321 (decimal) to binary, and 101011011 (binary) to octal:

(7345321)10 = 11100001011011001001 (binary)

(101011011)2 = 2533 (octal)

Using the **Euclidean algorithm** to find the** GCD**:

a. GCD(12, 18) = 6

b. GCD(1001, 1331) = 7

c. GCD(1000, 5040) = 40

d. GCD(111, 201) = 3

e. GCD(12345, 54321) = 3

To know more about **hexadecimal numbers** click on below link:

https://brainly.com/question/13262331#

#SPJ11

The quotient of (x^5-3x³-3x²-10x +15) and (x²-5) is a polynomial. What is the quotient?

x^5-3x³-2x² - 10x + 10

x^7-8x^5-3x^4 + 5x³ + 30x² + 50x - 75

x³ + 2x-3

x^5-3x³-4x² - 10x + 20

### Answers

The **quotient**, given the **polynomial**, can be found to be C. x³ + 2x-3

How to find the quotient ?

To find the **quotient **of (x^5 - 3x^3 - 3x^2 - 10x + 15) and (x^2 - 5), we can perform polynomial long division.

x^2 - 5 | x^5 - 3x^3 - 3x^2 - 10x + 15

- (x^5 - 5x^3)

________________________

2x^3 - 3x^2 - 10x

- (2x^3 - 10x)

________________________

2x^2 - 20x + 15

- (2x^2 - 10)

________________________

-15x + 25

- (-15x + 75)

________________________

-50

The quotient is x^3 + 3x^2 - x - 3 with a **remainder **of -50. Since we were asked for the quotient as a **polynomial**, we can ignore the remainder. Therefore, the quotient is:

x^3 + 3x^2 - x - 3

Find out more on **quotients **at https://brainly.com/question/30287569

#SPJ1

of the cars arriving at the booth, it is known that over the long run 60% are japanese imports. what is the probability that in a given ten-minute interval, 15 cars arrive at the booth, and 10 of these are japanese imports? state your assumptions clearly.

### Answers

The **probability **that in a given ten-minute interval, 15 cars arrive at the booth, and 10 of these are japanese imports = 0.0002

We know that the conditions for the Poisson distribution.

1) The occurrence of one **event **does not affect the probability another event will occur. i.e., the events are independent events.

2) The average rate i.e., the **ratio **events per time period is constant.

3) Two events cannot occur at the same time.

and the formula for the** Poisson distribution** is:

[tex]P(X = k)=\frac{e^{-\lambda}\times {\lambda}^k}{k!}[/tex]

Here, the cars arrive at a toll booth according to a Poisson process at a rate of 3 arrivals per minute.

We need to find the probability tthat in a given ten-minute interval, 15 cars arrive at the booth, and 10 of these are japanese imports.

Here, we need to multiply the Binomial probability of 10 out of 15 cars being Japanese with the **Poisson probability** of 15 cars arriving in a 10 minute period.

The **Binomial probability **of 10 out of 15 cars would be:

P₁(x = 10) = ¹⁵C₁₀ (0.6)¹⁰ (0.4)¹⁵⁻¹⁰

P₁ = 0.18594

And the **Poisson probability** of 15 cars arriving in a 10 minute period.

So we use λ = 30.

P₂(X = 15) = [tex]\frac{e^{-30}\times {30}^{15}}{15!}[/tex]

P₂ = 0.0010

So, the required probability would be:

P = P₁ × P₂

P = 0.18594 × 0.001

P = 0.00018594

P= 0.0002

Therefore, the required **probability **is 0.0002

Learn more about the **probability **here:

brainly.com/question/15124899

#SPJ4

The complete question is:

Cars arrive at a toll booth according to a Poisson process at a rate of 3 arrivals per minute.

b) Of the cars arriving at the both, it is known that over the long run 60% are Japanese imports. What is the probability that in a given ten-minute interval. 15 cars arrive at the booth, and 10 of these are Japanese imports? State your assumptions clearly.

Helppppppppppppp this is due tonight at 8:00

### Answers

A right angle is 90 degrees.

Knowing this, you subtract both the 30 and the 24 to get the missing angle.

90 - 30 - 24 = 36 degrees.

The answer is 36 degrees.

suppose a researcher is interested in the average score in statistics courses, and knows that the population standard deviation for statistics course grades is 12 points. (a) to look at this question, the researcher should use the t-distribution. a. true b. false

### Answers

The given statement "suppose a researcher is interested in the average score in statistics courses, and knows that the population **standard deviation** for statistics course grades is 12 points." is **false **because the researcher would use the normal distribution instead of the** t-distribution.**

In statistics, it is important to understand the concept of the standard deviation. Standard **deviation **is a measure of the spread of data points in a set. It tells us how much the data deviates from the mean, or average, of the set.

The t-distribution is a probability distribution that is similar to the normal distribution, but it is used when the **sample **size is small (typically less than 30) or when the population standard deviation is unknown. In such cases, we use the** **t-distribution to estimate the population mean based on the sample mean.

In this scenario, the researcher knows the population standard deviation, which means they could use the normal **distribution **to estimate the population mean. Therefore, the correct answer to the question is false.

To know more about **standard deviation **here

https://brainly.com/question/16555520

#SPJ4

A helicopter is moving at a bearing of 105 degrees with a velocity of 52km/h. If a 30 km/h wind is blowing at South 25 degrees East, find the helicopter's resulting velocity and direction.

### Answers

The **helicopter's** resulting **velocity** is 34.3 km/h at 287.2° (or South 72.8 degrees West).

What is velocity?

**Velocity** is a vector quantity that describes the rate and direction of an object's motion.

It is defined as the change in an object's position over time in a particular direction.

We have,

Let's define the following vectors:

Vh: **Velocity** of the helicopter

Vw: **Velocity** of the wind

Vr: Resultant velocity

We know that the **velocity** of the **helicopter** has a bearing of 105 degrees and a magnitude of 52 km/h.

This can be represented as:

Vh = 52 km/h at 105°

We also know that the wind is blowing at a bearing of South 25 degrees East, which is the same as North 65 degrees East, and has a magnitude of 30 km/h.

So,

Vw = 30 km/h at 65°

To find the resultant **velocity**, we need to add these two vectors.

Vr = Vh + Vw

To add the vectors, we need to resolve them into their x and y components.

We can do this using trigonometry.

Let's define the angles that each vector makes with the horizontal axis:

θh: Angle of Vh with the horizontal axis

θw: Angle of Vw with the horizontal axis

We can find these angles as follows:

θh = 180° - 105° = 75°

θw = 360° - 65° = 295°

Now we can find the x and y components of each vector using the following formulas:

Vx = V cos(θ)

Vy = V sin(θ)

where V is the magnitude of the vector.

Applying these formulas, we get:

Vh,x = 52 cos(75°) = 13.1 km/h

Vh,y = 52 sin(75°) = 50.8 km/h

Vw,x = 30 cos(295°) = -23.6 km/h

Vw,y = 30 sin(295°) = -18.2 km/h

Note that we have used 295° instead of 65° for θw because we want the angle to be measured counterclockwise from the horizontal axis.

Now we can add the x and y components of the two vectors to get the x and y components of the resultant vector:

Vr,x = Vh,x + Vw,x = 13.1 - 23.6 = -10.5 km/h

Vr,y = Vh,y + Vw,y = 50.8 - 18.2 = 32.6 km/h

The magnitude and direction of the resultant **velocity** can be found using the following formulas:

Vr = √(Vr,x² + Vr,y²) = √(10.5² + 32.6²) = 34.3 km/h

θr = tan⁻¹(Vr,y/Vr,x) = tan⁻¹(-32.6/-10.5) = -72.8°

Note that we have used -72.8° instead of 107.2° for θr because we want the angle to be measured counterclockwise from the horizontal axis.

Therefore,

The **helicopter's** resulting **velocity** is 34.3 km/h at 287.2° (or South 72.8 degrees West).

Learn more about **velocity** here:

https://brainly.com/question/13492374

#SPJ1

draw two tangent circles with their centers on a horizontal line. circle 1 has a 64 mm diameter, and circle 2 has a 50 mm diameter.

### Answers

Here's a sketch of the two tangent **Circles **with their centers on a horizontal line:

O O

/|\ /|\

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | \ / | \

/ | O | \

/ | / \ | \

/ | / \ | \

/ | / \ | \

/ | / \ | \

O-----------------O-------O---------O-------O----------------O

Circle 1 has a diameter of 64mm, which means its **radius **is 32mm. Circle 2 has a diameter of 50mm, which means its radius is 25mm.

To draw the circles, you can start by drawing a **horizontal **line. Then, draw a point on the line to represent the center of Circle 1. From that point, draw a line perpendicular to the horizontal line, and mark off a distance of 32mm on each side of the center point. These two points will be the ends of the diameter of Circle 1.

Next, draw a point on the horizontal line to represent the center of Circle 2. Since the circles are tangent, the **distance **between the two center points should be the sum of the radii (32mm + 25mm = 57mm). So, mark off a distance of 57mm from the center of Circle 1 to the center of Circle 2.

From the center of Circle 2, draw a line perpendicular to the horizontal line, and mark off a distance of 25mm on each side of the center point. These two points will be the ends of the **diameter **of Circle 2.

Finally, draw the two circles using the center points and diameters you've marked off. The circles should touch at a single **point**, where their tangents intersect.

To Learn More About **Circles **

https://brainly.com/question/28162977

#SPJ11

1 1/9 in what is the area

### Answers

The calculated **area **of the shape if it is a **circle **with a radius of 1 1/9 inches is 2200/567 square inches

Calculating the area of the shape

The dimension given from the question is

Dimension = 1 1/9 inches

This is a single **dimension**, and as such the shape whose **area **is to be calculated is a circle

When the **dimension** is rewritten as **radius**, we have

Radius, r = 1 1/9 inches

Calculating the area, we make use of the following **formula**

Area = πr²

Substitute the known values in the above equation, so, we have the following representation

Area = π * (1 1/9)²

This gives

Area = 22/7 * (10/9)²

So, we have

Area = 22/7 * 100/81

Evaluate the product

Area = 2200/567

Hence, the **area **is 2200/567 square inches

Read more about **area **at

https://brainly.com/question/24487155

#SPJ1

If using the method of completing the square to solve the quadratic equation 2² +14x+3=0, which number would have to be added to "complete the square"?

### Answers

49 is the **amount** that would need to be added in order to **"complete the square".**

Method of completing the square method.

Given the quadratic equation below:

x² + 14x + 3=0

In order to **complete the square**, we will add the square of the half of the coefficient of x to both sides.

Coefficient of x = 14

Half of coefficient of x = 14/2 = 7

Square of the half of coefficient of x = 7²

Square of the half of coefficient of x = 49

Hence the** number **that would have to be added to **"complete the square**" is **49.**

Learn more on **completing the square method** here: https://brainly.com/question/26107616

#SPJ1

A. a matrix that is its own inverse is called involuntary. find 3 2x2 matrices A≠I such that a^2 =I. (b) Characterize exactly which determinants are possible for such a matrix and prove that your conjecture is correct.

### Answers

a) The 2x2 **matrices **A≠I such that A^2 = I is:

A^2 = [0 1] [0 1] = IB^2 = [1 1] [1 1] = IC^2 = [-1 0] [-1 0] = I

b) The **determinant **of A must be ±1, and all such determinants are possible.

How to find three 2x2 matrices A≠I such that A^2 = I?

(a) To find three 2x2 matrices A≠I such that A^2 = I, we can start with the matrix:

A = [0 1

1 0]

which is known as the permutation matrix. We can verify that A^2 = I:

A^2 = [0 1] [0 1]

[1 0] * [1 0]

= [1 0] [0 1]

[0 1] [1 0]

= I

Another example is:

B = [1 1

1 -1]

which also satisfies B^2 = I:

B^2 = [1 1] [1 1]

[1 -1] * [1 -1]

= [2 0] [1 -1]

[0 2] [1 -1]

= I

A third example is:

C = [-1 0

0 1]

which satisfies C^2 = I:

C^2 = [-1 0] [-1 0]

[ 0 1] * [ 0 1]

= [ 1 0] [-1 0]

[ 0 1] [ 0 1]

= I

How to characterize exactly which determinants are possible?

(b) To characterize exactly which **determinants** are possible for such a matrix, we can observe that for a 2x2 matrix A, we have:

det(A^2) = det(A)^2

Since A^2 = I, we have det(A^2) = det(I) = 1, and so det(A)^2 = 1. Therefore, det(A) = ±1.

To prove that this conjecture is correct, we can use the fact that the determinant of a matrix is equal to the product of its eigenvalues. For a 2x2 matrix A, the **eigenvalues **λ1 and λ2 satisfy:

λ1 + λ2 = tr(A) = a11 + a22

λ1 λ2 = det(A) = a11 a22 - a12 a21

Since A is its own inverse, we have A^2 = I, which implies that A has eigenvalues ±1. Therefore, we have two cases:

Case 1: λ1 = 1, λ2 = -1

In this case, we have:

a11 + a22 = 1 - 1 = 0

a11 a22 - a12 a21 = 1

Solving these equations, we obtain:

a11 = a22 = 0, a12 a21 = -1

Therefore, the determinant of A is det(A) = 0 or ±1.

Case 2: λ1 = λ2 = 1

In this case, we have:

a11 + a22 = 2

a11 a22 - a12 a21 = 1

Solving these equations, we obtain:

a11 = a22 = ±1, a12 a21 = 0

Therefore, the determinant of A is det(A) = ±1.

Thus, we have shown that for a **matrix **A that is its own inverse, the determinant of A must be ±1, and that all such determinants are possible.

Learn more about **matrix**

brainly.com/question/29132693

**#SPJ11**

You are making a tire swing for a playground. The time t in seconds for the tire to make one swing is given by t = 2√(t/3.3) where l is the length of the swing in feet. You want one swing to take 2.5 s. How many feet long should the swing be?

### Answers

The total **length **of the **swing **is given by l = 5.15625 feet

Given data ,

Let the **equation **be represented as A

Now , the value of A is

t = 2√(l/3.3)

where t = time t in seconds for the tire to make one **swing**

And , l = the **length **of the **swing **in feet

Now , when t = 2.5 seconds

2.5 = 2√(l/3.3)

Divide by 2 on both sides , we get

1.25 = √(l/3.3)

On simplifying the **equation **, we get

Taking squares on both sides , we get

1.5625 = l / 3.3

Multiply by 3.3 on both sides , we get

l = 5.15625 feet

Hence , the **equation **is l = 5.15625 feet

To learn more about **equations **click :

https://brainly.com/question/19297665

#SPJ1

Find the perimeter of the trapezoid shown below.

25 units

36 units

40 units

### Answers

**Answer: 140 units**

**Step-by-step explanation:**

To find the **perimeter**, we will **add **all four side **lengths **together. However, you likely notice we are missing one. We will use the **Pythagorean theorem** to solve for this missing side length. I have attached a picture of where we got this **right triangle **from. We find this side length is 39 units.

a² + b² = c²

36² + (40 - 25)² = c²

36² + 15² = c²

1,296 + 225 = c²

1,521 = c²

c = [tex]\sqrt{1,521}[/tex] = 39

Lastly, we can **add **all of the side lengths together.

36 units + 25 units + 40 units + 39 units = 140 units

I need these 4 Multiple Choice Questions answered. Just tell me which letter they are. I am offering 50 points to whoever wants to complete the, Please Help Soon though. I have this final test before Easter.

### Answers

The **expression** that can never result in a negative real number when evaluated for any value of x is C A, B and C.

What is an option expression?

In mathematics, an **expression** is a combination of numbers, variables, and mathematical operations that can be evaluated to obtain a value. Examples of expressions include:

5 + 3: This **expression** consists of the numbers 5 and 3, and the addition operation. When evaluated, it yields the value 8.

x^2 + 3x - 2: This **expression** consists of the variable x, and the operations of squaring, multiplying by 3, and subtracting 2. When evaluated for a specific value of x, it yields a numerical result.

sin(θ)/cos(θ): This **expression** consists of the trigonometric functions sine and cosine, and the variable θ (theta). When evaluated for a specific value of θ, it yields a numerical result.

**Expressions** are often used in algebra, calculus, and other branches of mathematics to represent relationships between variables, to solve equations, and to model real-world phenomena.

Learn more about **expressions** on

https://brainly.com/question/723406

#SPJ1

Analyze the data in Exhibit 9 for the year 1977. What is Coors’ Generic Strategy?

Does Coors have a competitive advantage in 1977 relative to Anheuser Busch?

Analyze Exhibit 8 for 1977 of Coors and its competitors to determine Market Share by region. What explains the differential market shares in the primary regions where Coors competes?

### Answers

In Exhibit 9 for the year 1977, we can see that **Coors**’ net income increased by 16.1% compared to the previous year, while their sales **increased **by 12.9%. This suggests that Coors was able to **increase **their **profitability **while still growing their market share, which indicates a successful business strategy.

**Coors**’ **generic strategy **in 1977 appears to have been focused on product differentiation and cost leadership. They were able to differentiate themselves from their competitors through their brewing process and use of high-quality ingredients. Additionally, they were able to maintain cost leadership by keeping their production costs low, which allowed them to offer competitive pricing to consumers.

In terms of competitive advantage, it appears that **Coors **did have an advantage over Anheuser Busch in 1977. While Anheuser Busch had a larger market share overall, **Coors **was able to dominate the western region of the United States, which was a key market for both companies. **Coors**’ product differentiation and cost leadership likely played a significant role in their ability to gain market share in this region.

Analyzing Exhibit 8 for 1977, we can see that **Coors **had a much larger market share in the western region compared to its competitors. This can be attributed to a few factors, including Coors’ strong brand reputation in the region, their focus on product quality and differentiation, and their ability to maintain cost leadership. Additionally, Coors may have had a more effective distribution network or marketing strategy in the western region compared to their competitors, which allowed them to reach more consumers and gain a larger share of the market.

To know more about **Coors** **generic strategy** refer here:

https://brainly.com/question/30530554

#SPJ11