K = radius Areas = 1 12 h = height Area = h(2mr) Circumference Part a: Assume that the height of your cylinder is 4 inches. Consider A as a function of r, so we can write that as A (r) - 2 mr- + 8 mr. What is the domain of A (r)? 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 r as a function of A. This is the inverse function to A (r), i.e., to turn A as a function of r into r as a function of A