Question 10 8 pts Rate of Change of Cost McJesters can produce a hamburger for $2.61. If the restaurant's daily sales are increasing at a rate of 30 hamburgers per day, how fast is the daily cost for hamburgers increasing? Round the the nearest cent. $ per day D Question 11 7 pts Revenue The price-demand equation for hamburgers at Yaster's Burgers is x+ 401 p = 3.069. where p is the price of a hamburger in dollars and z is the number of hamburgers demanded at that price. What price will maximize the revenue for Yaster's? Round to the nearest cent. S per hamburger 12 20 pts