The outside of a closed glass display case measures 22 inches by 15 inches by 12 inches. The glass is \(\cfrac{1}{2}\) inch thick. How much air is contained in the case?
A shipping company has a rule that all packages must be rectangular prisms with a volume of no more than 9 cubic feet. What is the maximum measure for the height of a box that has a width of 1.5 feet and a length of 3 feet?