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The equation y = -6t^2 - 20t + 56 describes the height (in feet) of a ball thrown downward at 20 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.

 Nov 18, 2021
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y = o when the object hits the surface

0  =   -6t^2 - 20 t + 56           Use quadratic formula (or factoring) to solve for the positive value of 't'

 Nov 18, 2021

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