Abaseball player throws a baseball straight up into the air, the ball leaving his hand at time t = 0.0 s. the ball reaches maximum height at t = 1.4 s. when will the baseball return to the height from which it was released?

Atypical jetliner lands at a speed of 146 mi/h and decelerates at the rate of (10.4 mi/h)/s. if the jetliner travels at a constant speed of 146 mi/h for 1.5 s after landing before applying the brakes, what is the total displacement of the jetliner between touchdown on the runway and coming to rest?