The cost of a classified ad is based on a daily rate plus a flat service fee. one day cost $3.50 and four days cost $800 write and solve a linear equation to find the cost of a 7-day ad.

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?