Answer
$C = 28.26$
$A = 199.7$
Work Step by Step
The formula for circumference is $2\times\pi\times(radius)$ or $\pi\times(diameter)$
1. The diameter is 9 so we multiply $9\times\pi\approx28.26$
The formula for area is $(\pi\times radius)^{2}$
2. $(\pi\times4.5)^{2} = 199.7$
