Answer:
26 ft
C = 2πr
18 = 2(3.14)r
18 = 6.28r
r = 18/6.28
r ≈ 2.866
A = πr²
A = (3.14)(2.866)²
A = 3.14(8.213956)
A = 25.7918218...
A ≈ 26
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