Question

At a construction site, a builder plans to cut down an 8-foot-by-9-foot piece of plywood. She plans to discard any pieces that she cuts off. She keeps an exactly 7-foot-by-6-foot area of the plywood. What is the area, in square feet, of the pieces of plywood that are discarded?

Answer 1

30ft²

Step-by-step explanation:

The area of the plywood that she has:

8 ⋅ 9

=72ft²

The area of the plywood she cut

7 ⋅ 6

=42ft²

The area discarded should be:

72ft² - 42ft²

= 30ft²