In a 7th grade class, the ratio of boys to girls is 3 : 2. How many boys and how many girls could be in the class? Make sure the class has 30 students or less.

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?