The value of a dirt bike decreases by 20% each year. if you purchased this dirt bike today for $500, to the nearest dollar how much would the bike be worth five years later?

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?