baseball Malik popped a ball straight up with an initial upward velocity of 45 feet per second.
The height h, in feet, of the ball above the ground is modeled by the equation h= 2 + 48t - 16t2(16t의 제곱이에요).
How long was the ball in the air if the catcher catches the ball when it is 2 feet above the ground.
해설과 답부탁드려요~ 아이문제인데..ㅜ