Sam is driving at 75m. p.h when she sees a stationary school bus ahead of her. she manages to avoid hitting the bus by stopping just in time. her braking distance is 83.5 meter. calculate her reaction time (1 mile = 1600 meter)

You just purchased two coins at a price of $670 each. because one of the coins is more collectible, you believe that its value will increase at a rate of 7.1 percent per year, while you believe the second coin will only increase at 6.5 percent per year. if you are correct, how much more will the first coin be worth in 15 years?