Hugo is making a picture frame for a photo of his family The

Hugo is making a picture frame for a photo of his family. The photo is 8 inches by 10 inches. If the wood for the frame costs 50 cents an inch, how much will the wood for the frame cost?

A. $9.00

B. $12.00

C. $15.00

D. $18.00

Solution

D. To answer this question, you need to know the perimeter of the frame. For a rectangle, the perimeter is 2I + 2w. If w = 8 and I = 10, then the perimeter = 2(8) + 2(10) = 36 inches. At $0.50 per inch, multiply 36 × $0.50 to get the price of the wood.

36 × $0.50 = $18.00