The seventh and eighth grade bands held a joint concert. together there were 188 band members. if the eighth grade band is 3 times as big as the seventh grade band, how big is the eighth grade band?

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?