it took Carla 36 minutes to run 4 miles convert less ratio into a unit rate by finding how long it took Carla to run 1 mile

To find the unit rate of how long it took Carla to run 1 mile, we can divide the total time by the total distance.

Carla took 36 minutes to run 4 miles. To find the time per mile, we use the formula:

\[
\text{Time per mile} = \frac{\text{Total time}}{\text{Total distance}} = \frac{36 \text{ minutes}}{4 \text{ miles}} = 9 \text{ minutes per mile}
\]

So, it took Carla 9 minutes to run 1 mile.