Answer:
$11.65
Explanation:
Since each birdhouse 2.6 feet of plywood, and you are making 8 birdhouses, you have to is they are then you multiply 2.6 by 8 and get 20.8 square feet of plywood in total. Because each square ft is $0.56, you do $0.56 by 20.8 square ft you then get 11.648, but you round it to 11.65.