Question 1134024
z is directly proportional to x and inversely to the square of y. what is the percent of z if x is increased by 20% and y is decreased by 40%?
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z = k*x/y^2
z2 = k*(1.2x)/(0.6y)^2 = z*(1.2/0.36) = 10z/3
An increase of 7z/3 = 233.33...%