Posted by Marco on .
The formula for the surface area of a sphere is 4(3.14)r^2. What is the surface area of a ball with a diameter of 6 inches round? Round to nearest inch.
I got. 113.04 Rounded is 113 inch

Math quest3 
Reiny,
yes,
according to calculator value of π
SA = 113.097...
most calculators have π built in, why not use it ?