Antoine stands on a balcony and throws a ball to his dog, who is at ground level. The ball's height (in meters above the ground), x xx seconds after Antoine threw it, is modeled by: h ( x ) = − 2 x 2 + 4 x + 16 h(x)=−2x 2 +4x+16h, left parenthesis, x, right parenthesis, equals, minus, 2, x, squared, plus, 4, x, plus, 16 how many seconds after being thrown will the ball hit the ground