Question

A ball has a radius of 1 foot. What is the surface area of the ball?

Answer 1

The surface area of any sphere is    4 π (radius)².

When the radius is 1 ft, the surface area is

                                         4 π (1 ft)²  =  4π ft² .

                              

Answer 2

Answer:

 The surface area of the ball is $4\pi\ ft^{2}$

Step-by-step explanation:

we know that

The surface area of a sphere ( a ball) is equal to

$SA=4\pi r^{2}$

In this problem we have

$r=1\ ft$

substitute

$SA=4\pi (1^{2})=4\pi\ ft^{2}$