What is the GCF of 48M to the fifth N and 81N squared and n squared 3MM 3M squared n and 48M squared n and 129 and the fifth power and n squared

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?