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@CBARREDO1 what concepts/terms should I know to solve this problem?

What is your result for A, the 99% confidence interval?

(.7375, .8425) lower and upper bound

The answer should be yes since .95 isn't within the interval of .7375 and .8425. Is that correct?

Thank you kropot. So for part C, how do I go about solving that equation?

Also, I will need to go for a bit and come back later. Thanks again for your help!

N will be the result of that equation you posted?

I got 350.221

Yes. So rounding up, the sample size needs to be equal to or greater than 351.

AH, I see. Thanks so much! Any other work I need to show besides what you posted?

You're welcome. Hopefully what I have posted is enough :)

Thank you!