# Calculus

If a rock is thrown upward on the planet Mars with a velocity of 19 m/s, its height (in meters) after t seconds is given by H = 19t − 1.86t^2. When will the rock hit the surface?

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1. well, what is t when h=0?
h(t) = t(19-1.86t)

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2. I misread the question!! I was thinking that setting it equal to 0 would be something completely different. Thank you so much!

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3. ljhk,jb

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