Solve Application Problems of Quadratics Equations (Example 2)

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Question: A rock is thrown off a cliff. Its height, in meters, after t seconds is modelled by the function h(t)=−4.9t^2+10t+17.

a) How high is the cliff?

b) What is the height of the rock after 3s?

c) When does the rock hit the ground?
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SO HELPFUL same example found in textbook :D

shubanman