A20% apple juice drink is mixed with a 100% apple juice drink. the function f(x)=(2)(1.0)+x(0.2)2+x models the concentration of apple juice in the drink after x gallons of the 20% drink are added to 2 gallons of pure juice. what will be the concentration of apple juice in the drink if 6 gallons of 20% drink are added? give the answer as a percent but do not include the percent sign (%)
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