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The equation y = -6t^2 - 5t + 56 describes the height (in feet) of a ball thrown downward at 5 feet per second from a height of 56 feet from the surface from Mars. In how many seconds will the ball hit the ground? Express your answer as a decimal rounded to the nearest hundredth.

 Jul 29, 2021
 #1
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h = 0 when the ball hits the surface, sooooo

0 = -6t^2 -5t+56        use quadratic formula    a = -6    b = -5     c = 56

                                     to find t = 2.67  sec    or    t = - 3.5 (throw out)

 Jul 29, 2021

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