Chapter 14.3, Problem 18E

To determine

To calculate: The marginal productivity of the number of acres of the crop (y) when $x=300$ and $y=500$ where the number of crates of an agricultural product is given by $z=\frac{11xy-0.0002x^2-5y}{0.03x+3y}$ where x is the number of hours of labor and y is the number of acres of the crop. Interpret the answer.