Answer:
$ 224
Explanation:
1 yd = 3 ft
16ft = 16/3 yd
18ft = 18/3 yd = 6 yd
A = 16/3 × 6 yd = 32 yd²
1 yd² .............. $7
32 yd² ...........$x
x = 32×7/1 = $ 224
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