1. The problem statement, all variables and given/known data [PLAIN]http://www4a.wolframalpha.com/Calculate/MSP/MSP184619c56eg84971107d00001e292h4340heh8g4?MSPStoreType=image/gif&s=35&w=135&h=53 [Broken] It is a definite integral between x=0 and x=20. I forget how to integrate with a square root. Do you just change it to a power of a half and then integrate it? Been a while since I've done this, Thanks.