Hello!
This question simply asks for the area of the back lawn in square feet. Since it's shaped like a parallelogram, we must use the area formula to find out what the area is:
FORMULA:
A = bh
SUBSTITUTE:
A = 36 × 31
A = 1,116
The area of the lawn is 1,116 square ft.
(Write ft and put a small 2 above it. Sorry, I don't have access to symbols from a phone for whatever reason).
