Answer:
C. 745 ft.
Explanation:
first you can draw a rectangle, then write 3 and 5 on either side. Then you multiply 3 by 7 to get 21, then 5 by 7 to get 35. I got the 7 because every 1 in = 7 ft.. Finally you multiply 21 by 35 to find the area, and you should get 735.