Matthew Clemens, Physics and Math Teacher, Parent, and Tutor
To find the volume of a rectangular based solid, the formula is Length * Width * Height. Since this is specifically a cube, all the faces are squares, so Length = Width = Height = X. So now volume can be found by XXX or X^3 (note here ^3 means that whatever came before is raised to the 3rd power). So in this case, Volume = (2/3)(2/3)(2/3) = (2/3)^3. Perhaps you can finish it from here. Remember, the units are going to be feetfeetfeet = feet^3 = cubic feet.