For the following frequency distribution, ClassFrequency47 - 49450 - 52653 - 55856 - 58259 - 612What value better approximates the standard deviation? (Assume the data represent a population.)

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?