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"##