Refer to the picture for the problem please!​

Jabari is power washing houses for a summer job. for every job, he charges an initial fee plus $30 for each hour of work. his total fee for a 4 -hour job, for instance, is $170 . jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. write the function's formula.

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

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?