Answer:
b.
1017 sq. cm
Step-by-step explanation:
Surface area:
The surface area of a sphere with radius r is given by:
[tex]S = 4\pi r^2[/tex]
In this question:
Diameter of 18, since the radius is half the diameter, [tex]r = \frac{18}{2} = 9[/tex]
The surface area is:
[tex]S = 4\pi*9^2 = 1017[/tex]
So 1017 square centimeters, and the best option is b.
