8. At the snack bar, 7 hot dogs are sold for every 10 hamburgers sold. At
this rate, how
many hamburgers will be sold if 63 hot dogs are sold?
9. Jack delivered 90 circulars in 20 minutes. At this rate, how long will it
take him to deliver 135 circulars?
10. At the airport, 4 planes land every 8 minutes. At this rate, how