You can put this solution on YOUR website!
Ok, using your function...
, you are really asking the question...at what time, t, is the height of the banana equal to zero.
To find the answer to this question, we'll just set the function equal to zero and solve for t.
Factor out a -42t to simplify processing.
Now apply the zero products principle.
, then t = 0 This is the initial state or the time at which the banana was launched.
, then t = 12 seconds. This is when the banana reaches the ground again.