Rachel recieved a $70 gift card for a coffee store. she used it in buying some coffee that coffee that cost $7.73 per pound. after buying the coffee, she had $39.08 left on her card. how many pounds of coffee did she buy?

Martha is training for a duathlon, which includes biking and running. she knows that yesterday she covered a total distance of over 55.5 miles in more than than 4.5 hours of training. martha runs at a speed of 6 mph and bikes at a rate of 15.5 mph.