Question

What is the surface area, in square inches, of a sphere with a diameter of 8 in.? and round to the nearest whole number. Enter only the number.

Answer 1

SA = 201 in^2

Explanation:

The formula for surface area of a sphere is

SA = 4pi r^2

We know that the diameter is 8

To find the radius we cut the diameter in half.

r = d/2

r = 8/2 =4

Substitute in what we know.

SA = 4 *pi *4^2

= 4*pi*16

= 64*pi

Letting pi = 3.14

= 200.96 in^2

We want to round to the nearest whole number

SA = 201 in^2