Answer:
9.4 x 11 = 103.4
15 + 7 = 22, 22 x 5 = 110, 110 divided by 2 = 55
55 x 2 (since there are two trapezoids) = 110
5 x 11 = 55
7 x 11 = 77
15 x 11 = 165
Now we add all the areas up:
103.4 + 110 + 55 + 77 + 165 = 510.4 square feet2 is your answer.