urban water exam, science homework help

This exam contain of 11 questions, need them to be answer fully without missing any part please read them well before you choose to do it (put a bit). i need someone really good in science (urban water) that can get an A on this exam. 

this link is for question #9…

 http://www.freep.com/media/cinematic/video/83293358/


Thank you 

 
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