The height of the cylinder is 6 inches. We'll be analyzing the surface area of a round cylinder - in other words the amount of material needed to "make a can". A cylinder (round can) has a circular base and a circular top with vertical sides in between. Let r be the radius of the top of the can and let h be the height. that the height of your cylinder is 6 inches. Consider A as a function of r, so we can write that as A (r) = 2 πr² + 12 πг. What is the domain of A (r)? In other words, for which values of ris A (r) defined?
