Respuesta :

18. 6.5 meters of ribbon
19. 11.6 gallons of gas
20. 5 weeks

18.  6.5 meters,  you divide 5.98 by 0.92 and get 6.5.

19.  11.6 gallons, because again when you divide 329.44 by 28.4, you will get 11.

20.   5 weeks because when you divide 24.75 by 4.95 you get 5.