Can y’all help me pls

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 statement describes surface features called maria on the moon

Which expression gives you the distance between the points (5,1)and(9,-6)