The height of a right cylinder is 2r , where r is the radius. Write a function f in simplest form that represents the ratio of the surface area to the volume. f (r) = ?

David must install fencing around a lot that is shaped like a right angle.the side of lot that runs east-west is 200 ft long.the side of the lot runs north-south is 125 ft long.calculate how many feet of fencing he will need to surround the entire lot.

Why do interests rates on loans to be lower in a weak economy than in a strong one

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.