The volume of a right circular cone with radius r and height h is

V=r2h/3.

a. Approximate the change in the volume of the cone when the radius changes from

r=5.8

to

r=5.9

and the height changes from

h=4.00

to

h=3.94.

b. Approximate the change in the volume of the cone when the radius changes from

r=6.35

to

r=6.26

and the height changes from

h=13.0

to

h=12.92.

Find the approximate change in volume for both