Hello everyone. I need some help with this problem on my homework. Maybe just some tips in what to do first. This is my first time taking a math course in a few years and this is part of a review chapter before we get started with the actual text. I would really like to have a better understanding of the material before we start.

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

$\displaystyle v=40\,{h}^{2}\sqrt {96\,{h}^{-1}- 0.608}$

If h = 29 inches, how much gasoline is in the tank?

thank you