To estimate the number of minutes left, we first round both the watched minutes and the total movie length to the nearest tens.
- For the watched minutes (72), rounding to the nearest tens gives us 70.
- For the total movie length (149), rounding to the nearest tens gives us 150.
Now we can estimate the minutes left:
\[ \text{Estimated minutes left} = \text{Rounded total movie length} - \text{Rounded watched minutes} = 150 - 70 = 80 \]
So, the estimated number of minutes left is 80 minutes.
Now, for the actual number of minutes left:
\[ \text{Actual minutes left} = \text{Total movie length} - \text{Watched minutes} = 149 - 72 = 77 \]
Thus, the actual number of minutes left is 77 minutes.
To summarize:
- Estimated minutes left: 80 minutes
- Actual minutes left: 77 minutes