Question

A thrill ride at an amusement park travels 55 miles per hour. To the nearest hundredth, how many feet per second is this?

Answer 1

The first thing you should know are the following conversions:
 1mi = 5280 feet
 1h = 3600 s
 Applying the conversions we have
 (55) (miles / hour) (1/3600) (h / s) (5280/1) (feet / mi) = 80.67feet / s
 answer
 this is 80.67feet / s