Answer:
I predict it would be $45
Step-by-step explanation:
area of square = 9 x 9 = 81 square feet
area of 1 corner = 1/2 * 3 * 3 = 4.5 square feet
4.5 * 4 = 18 square feet total of all 4 corners
81 - 18 = 63 square feet total not covered by benches.
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The answer would be twelve 12 because 6x.5 is 3 and 3+9 is equal to 12