What are exponents?
they are very hard for me

Someone answer this check out the image!

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?

By what fraction name for 1 must 2/3 be multiplied to form a fraction with a denominator of 15