4(2a - 1) in expanded form

Find dy/dx using implicit differentiation ln(20+e^xy)=y

In the geometric progression –3, 12, −48… what term is 3,072?

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?