Question

Find the surface area of a sphere with a diameter 18 cm. Round your answer to the nearest hundredth.

Answer 1

Answer:

b.

1017 sq. cm

Step-by-step explanation:

Surface area:

The surface area of a sphere with radius r is given by:

$S = 4\pi r^2$

In this question:

Diameter of 18, since the radius is half the diameter, $r = \frac{18}{2} = 9$

The surface area is:

$S = 4\pi*9^2 = 1017$

So 1017 square centimeters, and the best option is b.