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 $7$ meters?
h(t) = -4.9t^2 + 14t - 0.4
7 = -4.9t^2 + 14t - 0.4
0 = - 04.9t^2 + 14t - 7.4 Use Quadratic formula to solve for two values of 't'......time between is the answer