using the value of a trigonometric function in excercises 47-52, use the value of the trigonometric function to evaluate each function

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.

I'm confused on this could anyone me and show me what i need to do to solve it.

52 cm radius = diameter = area = circumference = circumfer