A rectangle has a height of 5y^3 and a width of 3y^3-8y^2+2y find the area

Bradley hikes 12 miles in 3 hours. in relation to bradley’s hike, which statement describes the expression

Having a hard time understanding this question (see attachment).

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?