If anyone solves all three of these correctly I will give you 20 points, but please make sure that the answer is a complete simplified exact value in terms of pi, so just solve it as an equation, where pi is like a variable, don't substitute pi for anything. Please

Which of the following three dimensional figures has a circle as it’s base

Do one of the following, as appropriate: (a) find the critical value z subscript alpha divided by 2 , (b) find the critical value t subscript alpha divided by 2 . 99%; nequals 17; sigma is unknown; population appears to be normally distributed.

Afitness center has 2 membership plans one has a low dollar sign up fee of 15 dollars and costs 38 dollars per month to join. a second plan has a higher sign up fee of 78 dollars but a lower monthly fee of 31 dollars for what number of days of the month is the coat the same