Answer:
[tex]56.55[/tex] [tex]in[/tex]
[tex]254.47[/tex] [tex]in^{2}[/tex]
Step-by-step explanation:
[tex]C=\pi d[/tex]
[tex]C=18\pi[/tex]
[tex]C=56.54866776[/tex]
[tex]A=\pi r^{2}[/tex]
[tex]A=\pi(9)^{2}[/tex]
[tex]A=81\pi[/tex]
[tex]A=254.4690049[/tex]
