C. J says the quotient of -3/4 divided by 1/4 is -1/3 Part A: What Is The Correct quotient

Part B: What mistake Did C. J make?
a: he multiplied the reciprocals of both fractions.
b. He Added -3/4 and 1/4.
c. He multiplied -3/4 by 1/4
d. He Multiplied using the reciprocal of -3/4

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.