5. The management of Porter Airlines nds that its monthly marginal revenue can be approximated by Rm = 111.95 0.00643: where 3: is the average price of a ticket {in dollars) and RTE) is measured in millions of dollars per dollar. Determine the revenue function R{3:). (Hint: If the price of a ticket is zero dollars, the company's revenue is zero dollars.) 7. The current population of St. Catharines is about 133000. Suppose a major devel- opment is planned that would make the population grow at a rate of 1000t + 180t2 12 + 10 people/year, t years from now (0