In: Math
The total revenue (in hundreds of dollars) from the sale of x spas and y solar heaters is approximated by
R(x,y) = 11+196x+218y−8x^2−7y^2−4xy.
Find the number of each that should be sold to produce maximum revenue. Find the maximum revenue.
Find the derivatives Rxx, Ryy, and Rxy.
Rxx=____
Ryy=____
Rxy=____
Selling spas _____ and _____solar heaters gives the maximum revenue of $_____.