Stefan is making new cushion covers for a chair. There are three sizes of cushions on the chair. What is the surface area of the seat bottom cushion?
21 in
Net for Seat Bottom
3 in
10 in
3 in
21 in
21 in
3 in
seat back
15 in
10 in
arm rest
18 in
18 in
seat bottom
3 in
3 in
21 in
18 in
21 in
A. 756 square inches
B. 990 square inches
C. 846 square inches
D. 320 square inches