Answer:
[tex]81\pi[/tex]
Answer B is correct
Step-by-step explanation:
[tex]c = 2\pi \: r \\ 18\pi = 2\pi \: r \\ \frac{18\pi}{2\pi} = r \\ raduis = 9[/tex]
[tex]area = \pi {r}^{2} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 9 \times 9 \times \pi \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 81\pi[/tex]
