If x and y are positive numbers and z = xy^2, a 50 percent increase in x and a 30 percent decrease in y would result in which of the following changes in z?	Choose the most appropriate option:
A) decrease of 7.5%	B) decrease of 26.5%	C) increase of 16.5%	D) increase of 24.5%	E) increase of 32.5%
After the changes, z = 1.5x*(0.7y)^2 = (1.5*0.49)xy^2 = 0.735*z   The answer is decrease of 26.5%.
<result>B</result>
If x and y are positive numbers and z = xy^2, a 50 percent increase in x and a 30 percent decrease in y would result in which of the following changes in z?