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). As an improper fraction, for how long is the cannonball above a height of 6 meters?
+118608 solve the equation.
\(6 = -4.9t^2 + 14t - 0.4\)
Hint : it is a quadratic. Take it all to one side and use the quadratic formula.
The height will be above 6m between the time periods.
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