Amy is running in the 100-meter dash at her school's annual track meet. If Amy's speed is 8 meters/second, how long will it take her to run 100 meters? A.
8.5 seconds
B.
10 seconds
C.
12.5 seconds
D.
15 seconds

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?