Need help stuck with this

I'm being volume of cylinder with 13 in. radius and 30 in height answer choices in pic

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.

Solutions for 2x+7 less than or equal to 3x-5