1) Today's temperature will be at least 55°, but not more than 65º. Write and graph an inequality to show this situation.​

The expression is evaluated to 1/9. Option D

We need to know that index forms are described as mathematical forms used in the representation of number or variables that are too large or too small in more convenient forms.

Also, other names for these index forms are scientific notation and standard forms.

From the information given, we have that;

[tex]3^-^\sqrt[3]{8}[/tex]

Now, find the cube root of the exponent with value of 8, we have;

∛8 = 2

Substitute the value, we have;

3⁻²

Express as a fraction, we get;

1/3²

Find the square of the denominator

1/9

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The integral ∫1 to infinity 14/x¹⁰ dx converges, the series ∑ 14/n¹⁰ converges by the integral test.

The integral test to determine whether the series is convergent or divergent.

The integral test states that if f(n) is a continuous, positive, and decreasing function on [1, infinity), and if the series ∑ f(n) is convergent, then the series ∑ a(n) is also convergent, where a(n) = f(n) for all n.

Let f(n) = 14/n¹⁰.

Then f(n) is continuous, positive, and decreasing on [1, infinity).

To apply the integral test, we need to evaluate the integral

∫1 to infinity 14/x¹⁰ dx.

Using the power rule of integration, we have

∫1 to infinity 14/x¹⁰ dx = [(-14/9)x⁻⁹] from 1 to infinity

= [-14/(9 ×(infinity)⁹)] - (-14/9)

= 14/9.

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The given series, Σ(14/n^10) from n = 1 to infinity, is convergent.

To determine the convergence of the series using the integral test, we compare it to the integral of the corresponding function. Let's integrate the function f(x) = 14/x^10:

∫(14/x^10) dx = -14/(9x^9)

Now, we evaluate the definite integral from 1 to infinity:

∫[1,∞] (14/x^10) dx = lim[a→∞] (-14/(9x^9)) - (-14/(9(1^9)))

                    = 14/9

The integral of the function converges to a finite value of 14/9. According to the integral test, if the integral of the corresponding function is convergent, then the series is also convergent. Therefore, the series Σ(14/n^10) from n = 1 to infinity is convergent. In conclusion, the given series is convergent.

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The correct proportion for corresponding sides of the two similar rectangles is D. 4/12 = x/8.

To determine the correct proportion for corresponding sides, we need to compare the lengths of corresponding sides of the two rectangles. Let's denote the length of one side of the first rectangle as 12 units and the length of the corresponding side of the second rectangle as x units.

Option A states that 12/8 = x/8. However, this would imply that the length of the corresponding side in the second rectangle is equal to the length of the corresponding side in the first rectangle, which would mean the rectangles are congruent, not similar.

Option B suggests that 12/4 = x/8. By simplifying the equation, we get 3 = x/8, which implies that x = 24. This proportion does not hold since the length of the corresponding side should be less than 12 (the length of the corresponding side in the first rectangle).

Option C states that 12/4 = x/20. Simplifying this equation gives us 3 = x/20, which implies that x = 60. This proportion also does not hold since the length of the corresponding side should be less than 12 (the length of the corresponding side in the first rectangle).

Option D states that 4/12 = x/8. By simplifying the equation, we get 1/3 = x/8. This proportion holds, indicating that the length of the corresponding side in the second rectangle is one-third of the length of the corresponding side in the first rectangle. Therefore, the correct proportion for corresponding sides is D. 4/12 = x/8.

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a. The region of integration is the region between the curves[tex]y = x^4[/tex]and [tex]y = x^2[/tex], for 0 ≤ y ≤ 1.

b. The value of the integral is -0.6875.

To sketch the region of integration, we need to find the boundaries of the integral.

We are integrating with respect to x first, so we need to express the limits of integration for x in terms of y.

From the inner integral, we have:

y ≤ [tex]x^2[/tex] ≤ √y

Taking the square root of both sides of the right inequality, we get:

[tex]y^{1/4}[/tex] ≤ x ≤ √y

Thus, the region of integration is the region between the curves[tex]y = x^4[/tex]and [tex]y = x^2[/tex], for 0 ≤ y ≤ 1.

To sketch the region, we can first draw the curves [tex]y = x^4[/tex] and [tex]y = x^2,[/tex]as shown in graph (A) below:

  |          .

1  |       .  

  |    .  

  | .        

  *------------>

    0  1  2  3

The region of integration is the shaded region between the curves, as shown in graph (B) below:

  |          +

1  |       +  

  |    +++  

  | +++        

  *------------>

    0  1  2  3

To evaluate the integral, we can use the boundaries we found and evaluate the integral using the following steps:

[tex]\int 1_0 \int y_(\sqrt{y } ) 110x^2y^3dxdy[/tex]

[tex]= \int 0^1 \int x^{1/2}^x^2 110x^2y^3 dy dx[/tex] (using the limits we found earlier)

[tex]= \int 0^1 110x^2 [(1/4)y^4]_(x^{1/2})^{x^2} dx[/tex]  (integrating with respect to y)

[tex]= \int 0^1 110x^2 [(1/4)x^8 - (1/4)x^4] dx[/tex] (substituting the limits of integration)

[tex]= \int 0^1 (27.5x^10 - 27.5x^6) dx[/tex].

[tex]= [2.75x^11 - 3.4375x^7]_0^1[/tex](integrating and substituting limits)

= 2.75 - 3.4375.

= -0.6875.

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The probability that the mean height of 64 dogs is between 27 and 28.5 inches is approximately 0.8531.

We can use the central limit theorem to approximate the distribution of the sample mean. The central limit theorem states that if we take a large enough sample from a population, the sample mean will be approximately normally distributed with mean equal to the population mean and standard deviation equal to the population standard deviation divided by the square root of the sample size. In this case, we have:

Population mean (μ) = 28 inches

Population standard deviation (σ) = 4 inches

Sample size (n) = 64

a) To find the probability that the mean height of 64 dogs is less than 27 inches, we need to standardize the sample mean and find the corresponding area under the standard normal distribution. We have:

z = (sample mean - population mean) / (population standard deviation / sqrt(sample size))

z = (27 - 28) / (4 / sqrt(64))

z = -2

Using a standard normal distribution table or calculator, we find that the probability of z being less than -2 is approximately 0.0228. Therefore, the probability that the mean height of 64 dogs is less than 27 inches is approximately 0.0228.

b) To find the probability that the mean height of 64 dogs is greater than 28.5 inches, we standardize the sample mean and find the area to the right of the standardized value. We have:

z = (sample mean - population mean) / (population standard deviation / sqrt(sample size))

z = (28.5 - 28) / (4 / sqrt(64))

z = 1

Using a standard normal distribution table or calculator, we find that the probability of z being greater than 1 is approximately 0.1587. Therefore, the probability that the mean height of 64 dogs is greater than 28.5 inches is approximately 0.1587.

c) To find the probability that the mean height of 64 dogs is between 27 and 28.5 inches, we need to find the area under the standard normal distribution between the two standardized values. We have:

z1 = (27 - 28) / (4 / sqrt(64))

z1 = -2

z2 = (28.5 - 28) / (4 / sqrt(64))

z2 = 1

Using a standard normal distribution table or calculator, we find that the probability of z being between -2 and 1 is approximately 0.8531. Therefore, the probability that the mean height of 64 dogs is between 27 and 28.5 inches is approximately 0.8531.

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The sampling distribution is normal if the sampled populations are normal, and approximately normal if the populations are nonnormal and the sample sizes n1 and n2 are large: (A) TRUE

The central limit theorem states that as sample sizes increase, the distribution of the sample means approaches a normal distribution regardless of the shape of the population distribution, as long as the samples are randomly selected and independent.

Therefore, if the populations from which the samples are drawn are normal, the sampling distribution of the means will also be normal.

However, even if the populations are nonnormal, the sampling distribution will still be approximately normal if the sample sizes are large enough.

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However, to give you an idea of what you should include in the worksheet, I can tell you that it depends on the instructions that your teacher gave you. Here are some possible steps that you can follow:

Step 1: Follow the instructions provided by your teacher.If your teacher provided you with specific instructions on how to construct the worksheet, then follow them carefully.

This may include the format of the worksheet, the length of the responses, and the type of information that you need to include. Make sure to read the instructions carefully before you start constructing the worksheet.

Step 2: Include all necessary informationIn general, a worksheet should include all the relevant information that is needed to complete a task or to answer a question.

If you are constructing a worksheet for a math problem, for example, make sure to include all the necessary data and formulas that are needed to solve the problem.

If you are constructing a worksheet for a reading assignment, make sure to include all the necessary information about the text that you read.

Step 3: Check for accuracy and completeness Once you have finished constructing the worksheet, make sure to check it for accuracy and completeness.

This means checking that all the necessary information is included, and that there are no errors or omissions. Double-check your calculations and your spelling and grammar.

Step 4: Submit the worksheet to your teacherOnce you are satisfied with the accuracy and completeness of your worksheet, submit it to your teacher for grading.

Make sure to follow any specific submission instructions that your teacher has provided, such as the file format or the deadline for submission.

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Answer:

694

Step-by-step explanation:

The statement is false because the general least-squares problem attempts to find an x that minimizes ||b - Ax||.

The general least-squares problem aims to find a solution for the equation Ax = b when there is no exact solution. In other words, it seeks to find an x that minimizes the residual vector ||b - Ax||.

The residual vector represents the error between the actual values of b and the values predicted by the matrix equation Ax. The objective is to minimize this error by finding the values of x that provide the best approximation to the equation.

The least-squares solution is obtained by minimizing the sum of the squared residuals, which is equivalent to minimizing the norm (magnitude) of the residual vector. Therefore, the goal is to find an x that minimizes the expression ||b - Ax||.

The statement (a) suggests that the general least-squares problem aims to find an x such that Ax = b, which is not correct. If Ax = b has an exact solution, then there is no need for the least-squares approach. The least-squares problem is specifically designed for cases where there is no exact solution.

Option A is incorrect because it contradicts the purpose of the least-squares problem. Option B is incorrect because it suggests maximizing the norm of the residual vector, which is not the objective. Option C is incorrect because it claims that the statement is true, but the statement is actually false. The correct answer is Option D, which correctly states that the general least-squares problem attempts to find an x that minimizes ||b - Ax||.

By minimizing the residual error, the least-squares solution provides the best approximation to the equation Ax = b in situations where an exact solution is not possible. This has important applications in various fields, including statistics, data fitting, signal processing, and regression analysis.

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The given equation L = 2D + 300 represents the relationship between the total length of the road, L (in miles), and the number of days the crew has worked, D.

However, it's mentioned that the crew can work for at most 90 days. Therefore, we need to consider this restriction when determining the maximum possible length of the road.

Since D represents the number of days the crew has worked, it cannot exceed 90. We can substitute D = 90 into the equation to find the maximum length of the road:

L = 2D + 300

L = 2(90) + 300

L = 180 + 300

L = 480

Therefore, the maximum possible length of the road is 480 miles when the crew works for 90 days.

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The number of errors in a textbook follows a Poisson distribution with a mean of 0.04 errors per page. To find the expected number of errors in a textbook with 204 pages, we need to multiply the mean by the number of pages.

Expected number of errors = mean * number of pages = 0.04 * 204 = 8.16

Therefore, we can expect to find approximately 8 errors in a textbook that has 204 pages, based on the given Poisson distribution with a mean of 0.04 errors per page. It is important to note that this is only an expected value and the actual number of errors could vary.

Additionally, Poisson distribution assumes that the errors occur independently and at a constant rate, which may not always be the case in reality. Nonetheless, the Poisson distribution provides a useful approximation for the expected number of rare events occurring in a given interval.

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If we apply polynomial regression with degree =3 to a task with 3 features, a total of 20 features will be used in this model. This is because for each feature, we generate a polynomial combination with degree up to 3, resulting in a total of (3+3-1) choose 3 = 20 features.

If we apply polynomial regression with degree = 3 to a dataset with 3 features, then the resulting model will use a total of 20 features.

This is because polynomial regression with degree 3 involves creating new features by taking all possible combinations of the original features up to degree 3. In this case, we have 3 original features, so the number of new features created will be:

1 (constant term) + 3 (first-degree terms) + 32/2 (second-degree terms, since there are 3 features and we are taking combinations of 2) + 33*2/6 (third-degree terms, since there are 3 features and we are taking combinations of 3)

= 1 + 3 + 3 + 1 = 8 + 12 = 20

Therefore, the polynomial regression model with degree 3 applied to a dataset with 3 features will use 20 features in total.

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The statement is true for any n × n matrix A and any eigenvector X corresponding to the eigenvalue 3.

Let A be an n × n matrix and let X be an eigenvector of A corresponding to the eigenvalue 3. That is, AX = 3X.

Now we want to show that 2X is an eigenvector of A corresponding to the eigenvalue 6. That is, A(2X) = 6(2X).

Using the distributive property of matrix multiplication, we have: A(2X) = 2(AX).

Substituting AX = 3X (from the first equation), we get: A(2X) = 2(3X).

Using the associative property of scalar multiplication, we have: A(2X) = 6X.

Comparing this to the second equation, we see that 2X is indeed an eigenvector of A corresponding to the eigenvalue 6.

Therefore, the statement is true for any n × n matrix A and any eigenvector X corresponding to the eigenvalue 3.

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The measure of the arc angle JA is 76 degrees.

The sum of angles in a cyclic quadrilateral is 360 degrees. The opposite angles in a cyclic quadrilateral is supplementary.

Therefore, Let's find the measure of arc angle JA.

26x + 1 = 1 / 2 (18x + 4 + 6 + 32x)

26x + 1 = 1 / 2 (50x + 10)

26x + 1 = 25x + 5

26x - 25x = 5 - 1

x = 4

Therefore,

arc angle JA = 18x + 4

arc angle JA = 18(4) + 4

arc angle JA =72 + 4

arc angle JA = 76 degrees.

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Answer:

A speaker is a term used to describe the user who is giving vocal commands to a software program. ... A computer speaker is an output hardware device that connects to a computer to generate sound. The signal used to produce the sound that comes from a computer speaker is created by the computer's sound card

Step-by-step explanation:

rate nyoooo plssss

Answer:

[tex] \frac{a}{b} = \frac{3}{2} [/tex]

Step-by-step explanation:

Since both the triangles are similar, so their corresponding sides would be in proportion.

Therefore,

[tex] \frac{a}{b} = \frac{2.1}{1.4} \\ \\ \frac{a}{b} = \frac{3}{2} [/tex]

Eeither A is singular or det(A) = 1.

Let A be a square matrix such that A^2 = A.

If A is singular, then det(A) = 0, and we are done.

Otherwise, let B = A(I - A). Then we have:

B^2 = A(I - A)A(I - A) = A^2(I - A)^2 = A(I - A) = B

Multiplying both sides by B^-1 (which exists since B is invertible), we get:

B^-1 B^2 = B^-1 B

I = B^-1

Now we have:

det(A) = det(B)/det(I - A)

Since B = A(I - A), we have:

det(B) = det(A)det(I - A) = det(A)(1 - det(A))

Substituting into our expression for det(A), we get:

det(A) = det(A)(1 - det(A))/(1 - det(A))

Simplifying, we get:

1 = det(A)

Therefore, either A is singular or det(A) = 1.

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An n x n matrix a with an eigenvalue of multiplicity n is diagonalizable if and only if a = i, where i is the identity matrix.

Suppose a is diagonalizable. Then there exists an invertible matrix P such that a = PDP^(-1), where D is a diagonal matrix. Since a has an eigenvalue of multiplicity n, the diagonal entries of D are all equal to that eigenvalue. Therefore, a = PDP^(-1) = P(lambda I)P^(-1) for some scalar lambda. But since the eigenvalue has multiplicity n, lambda must equal the eigenvalue, which implies that D = lambda I. Therefore, a = [tex]P(lambda I)P^(-1) = PDP^(-1)[/tex] = P(lambda I)P^(-1) = lambda PPP^(-1) = lambda I. Thus, a = lambda I, and since the eigenvalue has multiplicity n, we have lambda = 1. Therefore, a = i.

Conversely, suppose a = i. Then a is trivially diagonalizable, since any matrix is diagonalizable if and only if it is already diagonal. Therefore, a is diagonalizable, and the proof is complete.

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Answer:

Step-by-step explanation:

To find the area of a rectangle, we multiply its length by its width.

The length of the rectangle is 2 2/3 inches, which can be expressed as an improper fraction: (3 * 2 + 2)/3 = 8/3 inches.

The width of the rectangle is 2 1/3 inches, which can also be expressed as an improper fraction: (3 * 2 + 1)/3 = 7/3 inches.

Now, we can calculate the area by multiplying the length and width:

Area = (8/3) * (7/3)

= (8 * 7)/(3 * 3)

= 56/9

Therefore, the area of the rectangle is 56/9 square inches, which can be simplified, if needed.

Answer:

Step-by-step explanation:

Suppose an upward force of 15 N is added to the box. What will be the net vertical force on the box?

THIS IS THE COMPLETE QUESTION BELOW;

1. Explain how you calculate the net force in any direction on the box.

2. Suppose an upward force of 15 N is added to the box. What will be the net vertical force on the box?

3. What force could be applied to the box to make the net force in the horizontal direction zero? Explain.

4. Suppose a force of 25 N to the right is added to the box. What will be the net force to the right?

CHECK THE ATTACHMENT FOR THE FIQURE.

1)since the given horizontal forces are acting on the box at opposite direction then

NET FORCE= (100- 50)N

= 50N( this is because the 100N and 50N acting Horizontally will cancel each other, then the remaining force is 50N.

✓Since, the  two vertical forces also acted on the box in opposite direction, then

NET FORCE= (25 25)N

= 0N

Note: horizontal forces are one acting from right to left and vice versa, while vertical forces are ones acting from up to down and vice versa.

HENCE, NET FORCE = 50N + 0N= 50N

2) since the net vertical force was 0N, if

15N force is added then we still have NET FORCE OF 15N

3) if  force of 50N is applied to horizontal forces moving from left to right then NET HORIZONTAL FORCES= 0N

4) since, the net force for the box is 50N, if  Horizontal force of 25N is added  moving left to right then NET FORCE = 25N for whole box.

The dot product is also known as the scalar product or inner product of two vectors. It is a binary operation that takes in two vectors and returns a scalar quantity. the value of u · v is -12. Hence, the correct answer is -12.

According to given information:

Given that u = ⟨1, √3⟩, |v| = 6, and the angle between the vectors is 120°,

we need to find the value of u · v.

To calculate the dot product, we can use the formula:

u · v = |u| |v| cos θ

where |u| is the magnitude of vector u,

|v| is the magnitude of vector v, and

θ is the angle between the vectors.

Let's plug in the values that we know into the formula:

[tex]|u| = \sqrt{(1^{2} + (\sqrt{3} )^{2}) }[/tex]

= 2cos 120°

= -1|v|

= 6u · v

= [tex]|u| |v| cos θ[/tex]

= (2)(6)(-1)

= -12

Therefore, the value of u · v is -12. Hence, the correct answer is -12.

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The length of the hypotenuse of the triangle is 6 inches, which is option D.

In order to find the hypotenuse of a right triangle, we use the Pythagorean theorem which is `a²+b²=c²`where `a` and `b` are the legs of the triangle and `c` is the hypotenuse. Here, the question mentions that the shortest side of the right triangle measures 3 inches and one angle of the triangle measures 60 degrees. Therefore, we need to find the length of the other leg and hypotenuse.The trigonometric ratios of a 60 degree angle are:

`sin 60 = √3/2`, `cos 60 = 1/2`, `tan 60 = √3`.

Now, we have the value of sin 60 which is `√3/2`. We can use it to find the other leg of the right triangle as follows:

Let `x` be the other leg.So, `sin 60° = opposite / hypotenuse => √3/2 = x / c`

Multiplying both sides by `c`, we get: `x = c(√3/2)`

Now, using the Pythagorean theorem, we can write:

`3² + (c(√3/2))² = c²`9 + 3/4 c² = c²

Multiplying both sides by 4 gives:

36 + 3c² = 4c²Simplifying: c² = 36 ⇒ c = 6

Thus, the length of the hypotenuse of the triangle is 6 inches, which is option D.

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Answer:

-1, y = 2

0, y = 3

2, y = 5

Step-by-step explanation:

-1, y = -1 + 3

0, y = 0 + 3

2, y = 2 + 3

Answer:

The triangles are similar

Step-by-step explanation:

Since EF ║ UT, m∠FUT = m∠EFU because alternate interior angles are congruent when lines are parallel.

m∠UDT = m∠EDF because vertical angles are congruetnt

Therefore ΔUDF is similar to ΔFDE because if two angles of a triangle are congruent to two angles of another triangle, then the triangles are similar.

The magnitude of the torque is 63 N·m, and its direction is along the positive y-axis.

The torque about the origin on a plum located at coordinates (-3 m, 0 m, 7 m) due to force F with component Fx = 9 N can be calculated using the torque formula:

Torque = r x F

Here, r represents the position vector (from origin to the plum), and F is the force vector. In this case, r = <-3, 0, 7> and F = <9, 0, 0>.

To find the torque, we need to compute the cross product of r and F:

Torque = <-3, 0, 7> x <9, 0, 0>

The cross product is given by:

Torque = <0(0) - 7(0), 7(9) - 0(0), -3(0) - 0(9)>
Torque = <0, 63, 0>

The magnitude of the torque is:

|Torque| = sqrt(0² + 63² + 0²) = 63 N·m

The direction of the torque is in the positive y-axis, as indicated by the non-zero component in the torque vector.

In summary, the magnitude of the torque is 63 N·m, and its direction is along the positive y-axis.

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The series Σ (from n = 1 to infinity) [(8n) / (7n - 5)] diverges.

The series provided is:
Σ (from n = 1 to infinity) [(8n) / (7n - 5)]

To determine its convergence or divergence, we can use the Limit Comparison Test. Let's compare it with the series 1/n:
a_n = (8n) / (7n - 5)
b_n = 1/n

Now, we find the limit as n approaches infinity:
lim (n → ∞) (a_n / b_n) = lim (n → ∞) [(8n) / (7n - 5)] / [1/n]

Simplify the expression:
lim (n → ∞) [(8n^2) / (7n - 5)] = lim (n → ∞) [8n / 7]

As n approaches infinity, the limit is 8/7, which is a positive finite number.

According to the Limit Comparison Test, since the limit is a positive finite number, the given series has the same convergence behavior as the series 1/n. The series 1/n is a harmonic series, which is known to diverge. Therefore, the given series also diverges.

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Answer:

-9

Step-by-step explanation:

Parentheses first:16-35+4 = -35+16+4 = -35+20 = -15

3(-15) = -45/5

-45 divided by 5 = -9

Step-by-step explanation:

Integrate with respect to 't'  the accel function to get the velocity function:

velocity =   v/7  t   + c1       when t = 0     this =1    so  c1 = 1

velocity =  v/7  t  +  1         integrate again to find position function

s =  v/14 t^2 + t + c2     when t = 0   this equals 2   so   c2 = 2

s = v/14  t^2  + t  + 2

( Let me know if this is incorrect and I will re-evaluate)

Amplitude of f  -[tex]x^{2}[/tex]+100x - 1200 is 350.

To find the amplitude of a periodic function, we need to find the maximum and minimum values of the function over one period and then take half of their difference.

In this case, the function f(x) is given by:

f(x) = -[tex]x^{2}[/tex] + 100x - 1200, 0 ≤ x ≤ 100

To find the maximum and minimum values of f(x) over one period, we can use calculus by taking the derivative of f(x) and setting it equal to zero:

f'(x) = -2x + 100

-2x + 100 = 0

x = 50

So the maximum and minimum values of f(x) occur at x = 0, 50, and 100. We can evaluate f(x) at these values to find the maximum and minimum values:

f(0) = -[tex]0^{2}[/tex] + 100(0) - 1200 = -1200

f(50) = -[tex]50^{2}[/tex] + 100(50) - 1200 = -500

f(100) = -[tex]100^{2}[/tex] + 100(100) - 1200 = -1200

Therefore, the maximum value of f(x) over one period is -500 and the minimum value is -1200. The amplitude is half of the difference between these values:

Amplitude = (Max - Min)/2 = (-500 - (-1200))/2 = 350

Therefore, the amplitude of f(x) is 350.

Correct Question :

suppose that f is a periodic function with period 100 where f(x) = -[tex]x^{2}[/tex]+100x - 1200 whenever 0 ≤x≤100. what is amplitude of f.

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