The height (in meters) of a shot cannonball follows a trajectory given by h(t)=-4.9t+14t-0.4 at time t (in seconds). For how many seconds is the height of the cannonball at least 6 meters?
So I'm guessing then the function would be something like
-49t+140t-4 is greater than or equal to 6. However, when I solved it, I got t is greater than or equal to 10/91. However, that's incorrect. Can someone help?
