Answer:
Well if no variable substitution is given its 10+q
10+q=10+q
The slope is equal to ³/₅.
For this we almost have the following equation:

We must match the equation to zero:

From here, we clear the value of t.
We have then:

We discard the negative root because we are looking for time:
Answer:
it will take him to reach the ground about:

seconds
I think it is scend choose