Charlie runs each lap in 6 minutes, we can expressed the total time as 6n where n is the number of laps.
He will run at most 66 minutes, "at most" means less than or equal.
Forming an inequality will be :
[tex]6n\le66[/tex]Since he won't exceed 66 minutes.
The value of n will be :
[tex]\begin{gathered} n\le\frac{66}{6} \\ n\le11 \end{gathered}[/tex]The answer is n ≤ 11