The height of a baseball that has just been hit can be calculated using the formula h=-16t^2+v0t+h0. If a baseball player hits the ball with a velocity of 81 feet per second and the bat impacts the ball at a height of 5 feet, when will the ball be 8 feet from the ground?

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?