Find the volume of a sphere of radius 3 centimeters

Now the formula for a sphere is 4/3 times PI times radius^3

Step 1) 
PI is going to equal 3.14 so put that in the formula

Step2) 
the radius is 3 so...
what you want to do now is do 3 times 3 times 3 because of 3^3.
So that gives you 27 meaning radius^3 equals 27 

Now the formula is going to be 4/3 times 3.14 times 27

Step3) 
you want to put Pi and the radius^3 together which will be 
3.14 times 27 
and that will equal 84.78
when you put it is the formula the formula will now be...
4/3 times 84.78

Step4)
Now just multiple 4/3 and 84.78 together and you get
113.04
so the volume of the sphere is 113.04

He is right i did this thing before