Amodel airplane takes off at a con height , in feet , after seconds ball is launched from ground level second . the height of the ball , h = - 16t ^ 2 + 45t . will the airplane and takes for the collision to occur. at a constant rate of 15 feet per second . its seconds is given by h at the same time , a round level with an initial velocity of 45 feet per of the bal , in feet , after seconds is given by and ball collide ? if so , find the time it