Answer:
The ballast bag hits the ground after 6 seconds.
Step-by-step explanation:
Suppose there was a small typing mistake.
The height of the ball, after t seconds, is given by the following equation:
After how many seconds t does the ballast bag hit the ground.
This is t for which f(t) = 0. So
Time is a positive measure, so
The ballast bag hits the ground after 6 seconds.