4/18/12 How do you find the surface area and volume of a sphere?

How do you find the surface area and volume of a sphere?

                                            Spheres 
- a sphere is a set of all points in space equidistant from a point called the center
Ex :

- In order to calculate the surface area of a sphere use the formula : SA= 4(pi)r^2
      - 'r' represents the radius of the sphere
In order to calculate the volume of a sphere use the formula : 4(pi)r^2/3
      -'r' represents the radius

Practice question: If the given radius of a sphere is 4 , What is the surface area of the sphere?

                                               Citations
Unit math example: ( Geometric solids) , http://www.unitmath.com/um/p/Examples/GeometricSolids/GeometricSolids.html ,  9/10/2000