The equation h = 4.9t2 + 17t + 2.2 models the height of a stone thrown into the air

Chapter 9, Problem 9

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The equation h = 4.9t2 + 17t + 2.2 models the height of a stone thrown into the air, where t is in seconds and h is in meters. Use the quadratic formula to find how long the stone is in the air.

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