How many moles of compound are there in the following?
6.60 g (NH4)2 SO4

How can you decide witch operations to use to slice a two step equation

What is the equation of the graph below? y=sec(x)-4

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?