B 9. Tim's Kayaks offers kayak rentals for $45 per hour. The business' weekly revenue is $1350. An informal survey shows that for every $2.50 decrease in price per hour they can expect an additional 3-hour rental. a) Write expressions for the price of a kayak rental per hour and the number of rental hours per week. b) Write an equation for the weekly revenue using your expressions from part a). c) What kayak rental price per hour would maximize weekly revenue? d) What is the maximum weekly revenue that Tim's Kayaks could receive