Can u help me plz and thank u

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.

Which of the following is the true for f(x) = 5cos

Manuela solved the equation below. what is the solution to manuela’s equation?