Terrance and jesse are training for a long distance race. terrance trains at a rate of 6miles every half hour, and jesse trains at a rate of 2miles every 15 minutes. a. what is the unit rate in miles per hour for each runner? b. how long will each person take to run a total of 50 miles at the given rates? c. sandra runs at a rate of 8 miles in 48 minutes. how does her unit rate compare to tarrance's and to jesse's?