Question

a company's monthly sales, in thousands, is given by s(x,y)=9x^.8y^.5. where x is the amount spent on newspaper advertising per month in thousands of dollars and y is the amount spent on radio advertising per month in thousands of dollars. Suppose the comany currently spends $5000 on newspaper advertising per month and $3000 pm radop advertising per month. What would be the effect on sales if the company increases the amount spent on newspaper advertising to $6000, while the amount spent on radio advertising remains constant?

Answer 1

it would grow by a factor of (6/5)^.8