Rupert drove home at an average rate of 58 miles per hour. What is his rate in feet per second?

##85.07 ” feet/sec”##
You need to know the conversion factors for each part.
1 mile = 1760 yards. 1 yard = 3 feet. 1 foot = 12 inches
1 hour = 60 minutes. 1 minute = 60 seconds.
To convert to a smaller unit, multiply – the number gets bigger.
To convert to a bigger unit unit, divide – the number gets smaller.
##”58 miles”/(“1 hour”) = (58 xx1760xx3 ” feet”)/(1xx60xx60 ” seconds”)##
=##(306240 ” feet”)/(3600 ” sec”)##
=## 85.07 ” feet/sec”##