To find the unit rate (feet per minute) of Roger Bannister's running, we first convert 4 minutes into minutes:
4 minutes = 4 minutes (no conversion needed).
Now, to find the feet per minute, we divide the total distance by the total time:
\[ \text{Feet per minute} = \frac{\text{Total distance (feet)}}{\text{Total time (minutes)}} \] \[ \text{Feet per minute} = \frac{5280 \text{ feet}}{4 \text{ minutes}} = 1320 \text{ feet per minute} \]
So, Roger Bannister ran at a rate of 1320 feet per minute.