Answer:
4400 feet/minute
Explanation:
To find the speed in feet/second, we need to convert miles into feet and hours into seconds.
Miles:
There are 5280 feet in one mile. Make this into a conversion factor:
(5280 feet/1 mile)
[Note that since the numerator and denominator are equivalent, this fraction is equal to 1 (they cancle out). But leaving it as written allows us to convert one unit to the other by multiplying the first unit by the conversion factor. This does not invalidate the originakl unit, since we are multiplying it by "1." The numbers change, yes, but the unit is still valid, just expressed in a different format.]
Seconds:
The number of minutes in an hour can be can be expressed as
(1 hour/60 min)
Convert:
We can use these two conversion factors to find the speed in feet/minute:
(50 miles/hour)*(5280 feet/mile)*(1 hour/60 min)
Miles and minutes both cancel, which leaves:
(50 )*(5280 feet)*(1 /60 min) or (50 )*(5280)*(1 /60) feet/minute
Multiply/Divide to obtain 4400 feet/minute