Lou applies for a job as a perfume salesman. He tries to convince the boss to try his daring, aggressive promotional gimmick: dousing prospective customers as they wait at bus stops. A hard ball is to be thrown straight upward with an initial speed of 24 m/s. A thin-skinned ball filled with perfume is then thrown straight upward along the same path with a speed of 14 m/s. The balls are to collide when the perfume ball is at the high point of its trajectory, so that it breaks open and everyone gets a free sample. If t = 0 when the first ball is thrown, find the time when the perfume ball should be thrown