A Shell station stores its gasoline in underground tanks that are right circular cylinders lying on their sides. See the illustration. The volume V of gasoline in the tank (in gallons) is given by the formula

where h is the height of the gasoline (in inches) as measured on a depth stick.
(a) If h = 12 inches, how many gallons of gasoline are in the tank?
(b) If h = 1 inch, how many gallons of gasoline are in the tank?

V = 40h, 96 h -0.608