He earns a fixed weekly salary of $300 plus a fee of $5 for each car he parks. his potential earnings for a week are shown in the graph. at what point does he begin to earn more from fees than from his fixed salary?

Starting at home, emily traveled uphill to the hardware store for 606060 minutes at just 666 mph. she then traveled back home along the same path downhill at a speed of 121212 mph. what is her average speed for the entire trip from home to the hardware store and back?