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Solving Quadratic Equations 4 - SAT

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This video is for the redesigned SAT which is for you if you are taking the SAT in March 2016 and beyond.

Solve Quadratic Word Problems - Trajectory Question

h = -4.9t2 + 25t

The equation above expresses the approximate height, h, in meters of a ball t seconds after it is launched vertically upward from the ground with an initial velocity of 25 meters per second. After approximately how many seconds will the ball hit the ground?
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