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August 5, 2015

Homework Help: math

Posted by Jason P on Thursday, July 23, 2009 at 4:14pm.

a chemist has a solution that is 20 percent alcohol by volume. which of the following expressions represents the percent of alcohol by volume when m litersof the solution is mixed with h liters of pure alcohol and p liters of water?

a) 20(m+h+p)%
b) 20(m+h)/m+h+p)
c)20?h+p
d) 20m/h+p
e) 20m+100h/m+h+p

please explain

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