Question

what is the surface area of this sphere?
round your answer to the nearest hundredth.
18 in
square inches

Explanation:

Step1: Find radius of the sphere

The diameter is 18 in, so radius $r = \frac{18}{2} = 9$ in.

Step2: Apply surface area formula

Surface area of sphere: $4\pi r^2$. Substitute $r=9$: $4\pi(9)^2 = 4\pi \times 81 = 324\pi$.

Step3: Calculate numerical value

$324\pi \approx 324 \times 3.1416 \approx 1017.88$

Answer:

1017.88