An rock is thrown downward from a platform that is 215 feet above ground at 55 feet per second. Use the projectileformula 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 afterNote: Round any numerical responses to two decimal places. If there are multiple answers, separate them with commas.Select an answer