Question

What is the surface area of a sphere with a radius of 16 units?

a. 288 units2
b. 1024 units2
c. 256 units2
d. 1024 units2?

Answer 1

The surface is
`1024\pi units^(2)`.

Explanation:

The surface of a sphere is given by the following formula:

`S = 4\pir^(2)`

In which r is the radius of the sphere.

In this problem, we have that:

A radius of 16 units, so
`r = 16`.

So

`S = 4\pir^(2) = 4\pi(16)^(2) = 1024\pi units^(2)`

The surface is
`1024\pi units^(2)`.

Answer 2

we know that
[surface area of a sphere]=4*pi*r²
for r=16 units
[surface area of a sphere]=4*pi*16²-----> 1024*pi units ²

the answer is
1024*pi units²