Question

Find the surface area of a sphere with a radius of 8cm.

(use 3.14 for pi and round to the nearest tenth)

A. 267.9 cm^2
B. 803.8 cm^2
C. 2143.6 cm^2
D. 201.0 cm^2

Answer 1

the answer is B 803.8cm^2

Answer 2

By definition, the surface area of a sphere is given by:

`image`

Where,

r: sphere radius

Substituting values in the given equation we have:

`image`

Doing the calculations we have:

`image`

Rounding to the nearest tenth:

`image`

Answer:

The surface area of a sphere with a radius of 8cm is:

B. 803.8 cm ^ 2