LeAnn wants to giftwrap a present she got for her little brother. How many square inches of giftwrap will be needed to cover a box that is 5in x 7in x 3in?
Just find the surface area. 57=35, but 352=70, because the top and bottom. Then do 732=42, for 2 parallel sides, and then 352=30. Now add 70+30+42=142 square inches. There's your answer.
