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The height (in meters) of a shot cannonball follows a trajectory given by h(t) = -4.9t^2 + 18t - 0.4 at time t (in seconds). As an improper fraction, for how long is the cannonball above a height of 6 meters?

 May 14, 2021
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-4.9t^2 + 18t - 0.4  > 6

-4.9t^2 + 18t - 6.4 > 0      use quadratic formula to find the two t values     subtract the smaller from the larger

 May 14, 2021

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