5

challenge each flea treatment usually lasts for about 4 weeks, but one year the fleas

were especially bad. jim's dog needed to be treated for fleas every 3 weeks until the

weather cooled off.

a

how many weeks of flea treatments would jim's dog get from one package if

each treatment only lasted 3 weeks?

b

in a normal year, when a flea treatment lasts 4 weeks, how many more weeks of

treatments would jim's dog get from one package?