Question

The surface area of a sphere is 113.04 mm². What is the approximate volume of the sphere? Use 3.14 for and round to the nearest hundredth.

Answer 1

Answer:

As you may, or I would say you shoul, the Area of a circle is equal to PI * r^2

Since you have the are given already and Pi being equal to 3.14. You just need to rearrange the equation and get r by itself.

This if what I mean.

A = Pi* r^2 { A= 113.04 } { Pi = 3.14}

Put the values A and Pi in the equation that is given

So here is how it should look.

113.04 = 3.14* r^2

Divide both sides by 3.14

So you have 113.04/3.14 = r^2 which is equal to > 36=r^2

Square root both sides to get r by it self. Which is what we want.

Root r^2 = Root 36

Notice that 36 is a perfect square.6*6(6 square)

1. r = 6