An rock is thrown upward from a platform that is 191 feet above ground at 65 feet per second. Use the projectile formula h = 16t2 + vot + ho to determine when the rock hit the ground. -[Recall that vo is the initial velocity of the object and he is the inital height of the object.] Answer: The rock will hit the ground after Select an answer Note: Round any numerical responses to two decimal places. If there are multiple answers, separate them with commas.