A researcher wants to estimate the average number of hours students spend in social media in a day. From the previous studies, the standard deviation is estimated at 45 minutes. What should be the sample size if the researcher wants to be 90% confident of being correct to within 5 minutes? 220 197 219 198

Q: 16. Find mBC 240 D

A:

Q: the answer is incorrect is not 64pi

A: see below the answer

Q: 3 State true or false. 125= ±5 512= 6 343 7

A:

Q: Evaluate. (32-22) + 2 O 10 O 10 O 5 O 5

A: use BODMAS to simplify the expression.

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A: Given :-∠AOB=4y∠FOE=3y∠DOC=2yNow, as we know that,∠AOF=∠DOC=2y      ...(vertically opposite…

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A: Given expression m26n.n23mwe want to simplify the given expression

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A: 3thousands + 7tens +5ones

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A: Given

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A:

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A:

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A:

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A:

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A:

Q: It was not 126. I cannot figure it out

A: We have to Find the fifth root of -32i that graphs in the fourth quadrant.

Q: 22 \11 30 Q,

A:

Q: 190+45-23=?

A: 190+45-23=?

Q: to 40 ーと。

A: Solving the above diagram.

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A:

Q: what two numbers mulitplied give you 225

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A:

Q: Evaluate 00 n=4 23n 9n

A:

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A: Solution: The objective is to find the value of the double integral

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A:

Q: Evaluate Lin (escrLe"dzdydx

A: Evaluation of triple integrals

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A: we know that  --x=+x here x=10

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A:

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A:

Q: 3.00÷4

A: The detailed solution is given below Thank you

Q: DAWN

A: 2. Use the encoding formula y = x+15(mod26) 1. Encode DAWN Conversion of numerical value between 0…

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A: An integer n is said to be even if n=2k for some integer k and an integer  is said to be odd if…

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A: