Please help! / 50 points What is the surface area of a cylinder with base radius 4 and height 5? Select the exact answer in terms of π.

a) 72π
b) 36π
c) 48π
d) 56π

What is the value of the digit 1 in the number 13?

Which simplifys to a+ b? a-(1-b)+1 -(1-a)-b+1 (a--1) -1)+1

Adecorative window is made up of a rectangle with semicircles at either end. the ratio of ad to ab is 3: 2 and ab is 30 inches. what is the ratio of the area of the rectangle to the combined area of the semicircles? possible answers: a. 2: 3 b. 3: 2 c. 6: π d. 9: π e. 30: π