Corey needs 24 boards that are 47.5 inches long.

Question

A. How many feet of boards should he buy? 

B. If you can only buy 8-foot boards, how many should he buy?

Answer 1

To answer part A, we multiply 24 boards by 47.5 inches to get 1,140 inches, which is 95 feet of boards.  To answer part B, we know that an 8-foot board is 96 inches, so we can divide 1,140 by 96 to get 11.875 boards that Corey must buy, but since he can only buy 8-foot boards, he will have to buy a total of 12 boards and he will have extra left over.