Posted by jay on .
could you please tell me how you got the answer reguarding the 2" pipe i would really appreciate it. Thanks

math 
Ms. Sue,
A pipe is 2" outside diameter and it has 3/16" walls .What is the inside diameter,?
math  Ms. Sue, Sunday, June 24, 2012 at 3:50pm
2  2(3/16)
2  6/16 = 1 10/16 = 1 5/8
I multiplied 3/16 by 2.
2 * (3/16) = 6/16
I subtracted the walls from the outside diameter.
2  6/16 = 1 10/16
Then I simplified that fraction.
10/16 = 5/8
This site may help you visualize that.
http://etc.usf.edu/clipart/36400/36447/pipe1_36447.htm 
math 
Alisa,
A standard basketball has a diameter of 9 9/16 inches (that is 9 inches and 9/16 of an inch). What sit he volume of air in the basketball?