A circle with a radius of 5 inches. The shaded sector has an area of 20 inches squared. What is the length of the arc that is the boundary of the sector shown? Use 3.14 for π, and round to the nearest whole number. inches

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?