A piece of cardboard that measures 2 feet by 3 feet can be folded into a box if notches are...

A piece of cardboard that measures 2 feet by 3 feet can be folded into a box if notches are cut out of the corners. The length of the side of the notch will be the same as the height h of the resulting box. The volume of the box is given by 4h^(3) - 10h^(3) + 6h . Find the volume of the box for h = 0.25 and h = 0.5.