Find the length of the missing side.
Please help

What are the domain and range of the function f(x)=2^x+1

Determine domain and range, largest open interval, and intervals which function is continuous.

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?