Posted by emily on .
An alcohol solution consists of 6 gallons of pure water and x gallons of alcohol, x > 0. Let f(x) be the ratio of the volume of alcohol to the total volume of liquid. [Note that f(x) is the concentration of the alcohol in the solution.]
(a) Find a possible formula for f(x).

math 
Henry,
a. F(x) = x/(x+6).