After winning a U.S. Open Tennis match at Arthur Ashe Stadium, players fire several tennis balls into the stands as souvenirs. Some players try to hit the ball out of the stadium, at a height of 518 feet. It has never been done. If the ball is propelled from a tennis racket straight up, the ball’s height after t seconds is given by 2 0 h v t t  16 where 0 v is the initial velocity. What is 0 v in order for the ball to reach a maximum height of 518 feet? How long will it take for the ball to reach that height?