Sonya is going to throw a ball from the top floor of her middle school. when she throws the ball from 160 160 feet above the ground, the function h ( t ) = − 16 t 2 + 48 t + 160 h ( t ) = − 16 t 2 + 48 t + 160 models the height, h h , of the ball above the ground as a function of time t t . find the time(s) when the ball's height is 160 160 feet. the ball has a height of 160 160 feet when t =