Mark bought a double oven electric range for $1350. he made a 15% down payment and financed the balance, paying $150 a month for 10 months. how much did mark pay in all for the range?

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?