In tennis, gabby serves an ace, a ball that can't be returned, 4 out of the 10 times she serves. what is the experimental probability that gabby will serve an ace in the first match of the next game? make a prediction about how many aces gabby will have for the next 40 serves. justify your reasoning.

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?