Suppose we wish to calculate a 95% confidence interval for the average amount spent on books by freshmen in their first year at a major university. The interval is to have a margin of error of $3. Assume that the amount spent on books by freshmen has a Normal distribution with a population standard deviation o is $30. How many observations are required to achieve this margin of error? 19 20 384 385

Q: 5. Ф(41) Answer: Show your work or explain your reasoning here:

A: We want to calculate ϕ(41)

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A:

Q: |8 -5 1| 5. If 5 16 1 = 2, then what is value of x 1l 3 а. 6 b. 5 c. 8 d. 4

A: using the concept of determinant.

Q: 1.) y = 2x + 3

A: y = 2x + 3

Q: 31. | V36 — 9х2 dх

A: Use trigonometric substitution x=2sint.

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A:

Q: 4. J da 4 4 (a²-3)

A:

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A: …

Q: factor. .63. —2г1 + х .65. у(у — 6) + 9(у - 6)

A: GCF of the terms= x  So we factor out x

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A: Indefinite integration

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A:

Q: (8) y=x +5 -6 -5 -2

A:

Q: Consider the following equation f (x,y) = x²y. Find the derivative of f in the direction of (1, 2)…

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Q: / Find A" if 1 2 3 A = 4'1 5 1 %3D

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Q: 1 =dx O v7 O VīO O vīl O v8 Ov9 6,

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Q: 4. State whether the statements are true or false. Explain. (a) There is an even number multiple of…

A:

Q: 2. Ф(24) Answer:

A: We want to find ϕ(24)

Q: f z dz z+1 Ans. 1 - Int

A:

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A: Given,        ∫45+9t+125+9t7dt

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A: Given integration is ∫5s23+2s3 ds We have to solve the integration. Needed formulae:…

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Q: 5. (2x + 3V )dx 2х + 3уx

A:

Q: 4. (4 – 7)² – 6 - 7+ 20

A: Recall: BODMAS Rule : The BODMAS Rule states that we should calculate the brackets first ,then the…

Q: 3. 2π 3 TT .b O 3. Зл .d O II

A: We use the Euler Reflection formula to find the value of the given expression.

Q: QUESTION 7 1 Let A = 7 and B 5 8 . Find (AB). 6 -5 -7 4 6 - 1 (AB)" 15 - 1 -44 36 (AB)" %3D 65 - 28…

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Q: 6. Given i [2, – 5]and i = [-7,2] find a. 5ū

A: Topic = Vector

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A:

Q: +1 dx -8 Evaluate

A:

Q: 2ェ+ 3z d 平

A: We can find the integration as below

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A:

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A:

Q: 3 Q 4. Differentiate Vx2 Vx2 2 +

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Q: 23) у CSC X

A: We need to graph the given function y.