The area of a circle is Pi * R^2 (or R * R). Since we have our radius, R, we can solve. With our given answer choices, we do not need to multiply R by Pi, instead we will square R, as that's our only option. 4.5 x 4.5 = 20.25. Our area is now 20.25Pi. Your answer is C.) 20.25Pi. I hope this helps!
