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The height (in meters) of a shot cannonball follows a trajectory given by h(t) = -4.9t^2 + 14t - 0.4 at time t (in seconds). For how many seconds is the height of the cannonball at least 6 meters?

 Oct 24, 2022
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Set -4.9t^2 + 14t - 0.4 = 6, solve the quadratic for two values of t and take the difference between them.

 Oct 24, 2022

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