The volume of a right circular cone with radius r and height h is V = mr-h/3. a. Approximate the change in the volume of the cone when the radius changes from r = 5.7 to r = 5.9 and the height changes from h = 4.20 to h = 4.14. b. Approximate the change in the volume of the cone when the radius changes from r = 6.29 to r = 6.28 and the height changes from h = 12.0 to h = 11.94