Aflea treatment last 4 weeks. jim’s dog had to be treated every 3 weeks. how many weeks of flea treatment would jim’s dog get if the treatments only lasted 3 weeks?

Me its important ! marge runs an ice cream parlor. her speciality is triple chocolate sundaes.she can prepare 1 sundae every 2 minutes, and she earns $1.20 for each sundae she makes . if she just makes sundaes for a single shift of at most 4 hours and at least 2 hours , which function relates her earnings to the number of minutes she works?