9. Tim has a rectangular patio that is 40 feet by 25 feet. In the center of the patio, there is a circular pond that has a diameter of 20 feet. Tim wants to resurface the
floor of the patio. He needs to calculate the area of the patio floor in order to
purchase the correct amount of material. What is the area of the patio floor?
A 256 sq ft
B 1,000 sq ft
C 686 sq ft
D 1,314 sq ft