To convert a speed from miles per minute to feet per minute, you would use the conversion factor that expresses the relationship between miles and feet. Specifically, you want to convert miles into feet.
The conversion factor you would use is:
\[ \frac{5280 \text{ feet}}{1 \text{ mile}} \]
This conversion factor tells you that there are 5280 feet in 1 mile, allowing you to convert miles to feet. Therefore, if you have a speed in miles per minute, you can multiply by this conversion factor to express it in feet per minute.
So, the correct conversion factor is:
\[ \frac{5280 \text{ feet}}{1 \text{ mile}} \]
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