Ella stacks two boards under a table to make it level. one board is 78 inch thick. the other board is 512 inch thick. which equation most closely estimates the thickness of the two boards?

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?