Average rate of change from x = -3 to x = 1 is (f(1) - f(-3))/(1 - (-3)) = (5 - (-3))/(1 + 3) = (5 + 3)/4 = 8/4 = 2
The equation for surface area is:

. To get r, you must use Pythagorean theorem. r is found to be 45. This means after you plug it in, you get about
13571.68
Can't reallly see the paper
Cheyenne sells 7.1428% of her cards at the craft fair. I hope this helps you!