Answer:
The answer would be 75,416 feet / minute.
And the conversion would be: 857 miles / 1 h = (1h / 60 minutes) (5280 feet / 1 mile)
Explanation:
Conversion factors are mathematical operations used to make unit changes of the same magnitude, in magnitudes of weight, time, or length. etc.
It consists of multiplying one or more fractions several times in which the numerator and the denominator are equal quantities expressed in different ways.
For example: 1 hour = 60 minutes = 3600 seconds.
857 miles / 1 hr = (1h / 60 minutes) (5280 feet / 1 mile)