An engineer earns $6000 per month. a contractor makes $80 per hour, while a teacher gets basic salary of $3000 and $50 per hour any additional job. considering a month, which job    is better; when, and why? justify your answer using graphs, equations, and tables              

The contractor has a better job because he receives the highest salary among the three.

Multiplying 8 hours of work by 20 working days in a month, we will get 160 monthly working hours.

Now let's compute:
Engineer: $6000 per mo. / 160 hrs. = $37.5 per hr.
Contractor: $80 per hr. * 160 hrs. = $12,800 per mo.
Teacher: $3000 per mo. / 160 hrs. = $18.75 per hr. + $50 per hr = $68.75 per hr.