Question

A pronghorn antelope can run at speeds of about 59 miles per hour. What is that speed in feet in a mile, 60 seconds in a minute, and 60 minutes in a hour

Answer 1

Sorry, but it's unclear what you want here.  You could, of course, convert 59 mph to feet per second or something like that:

59 mph     5280 ft         1 hr
----------- * ----------- * --------------
      1          1 mi          3600 sec

If this isn't what you wanted, please edit your question so that it becomes clearer to others who would like to help you.