4.4.2 Optimizing Quadratics

Ex 1 A theatre company has 300 season ticket subscribers. The owner has decided to raise the cost of season ticket from the current price of $400. A survey finds that for every $20 increase in price, 10 subscribers would not renew their tickets. What price would maximize revenue?

Ex 2 The student's council plans to run the annual talent show to raise money. Last year, tickets sold for $11, and 400 people attended. The student's council has decided to raise the ticket price for this show. They figure that for every $1 increase in price, 20 less people will buy tickets. What is the maximum revenue?

p.118#15-18,20,achievement check