Mar 12, 2013 #1 S Sarah Active member Joined May 11, 2008 Messages 2,241 Reaction score 0 Points 36 This is a homework question that I don't quite understand, please help
Jul 10, 2013 #2 S shadow1 Member Joined May 14, 2008 Messages 245 Reaction score 0 Points 16 look it up on google dude its that easy....