Coach Roberts has a device that launches baseballs into the air so the outfielders can practice catching pop-ups. If it launches a ball with a velocity of 115 feet per second, after how many seconds will the ball be at a height of 140 feet above the ground? Use the equation for projectile motion h=-16t²+v₀t where h is the height of the ball seconds after it is launched at an initial velocity of v. Enter multiple answers separated by a comma and round all of your answers to one decimal place.
