I thought the answer i gave was right but it's not . Did i write it correctly?

Paraphrasing T... [ aSolvad A cyimd . sides in between, Let r be the : ' the height. The surface area of the cylinder, A two circles for the top and bottom plus a rolled up rectangle for the side) , Ir = radius =/ Areas = 7 12 h = height ) ) Area = h(2nr) ...... * Circumference - 27 Part a: Assume that the height of your cylinder is 4 inches. Consider A as a function of 7, so we can write that as A (r) = 2 7r2 + 8 7r. What is the domain of A (7)? In other words, for which values of r is A (r) defined? Part b: Continue to assume that the height of your cylinder is 4 inches. Write the radius 7 as a function of A. This is the inverse function to A (7),i.e to turn A as a function of r into. as a function of A. -8 n+1/ 64 7r2+8 A r(A) = 47