Solve the problem.
-DG's Plumbing and Heating charges $\$ 50$ plus $\$ 70$ per hour for emergency service. Bill remembers being billed just over $\$ 300$ for an emergency call. How long to the nearest hour was the plumber at Bill's house?
A) 13 hours
B) 4 hours
C) 5 hours
D) 15 hours

Question

Quizplus · Accepted Answer

The total cost is \$50 (initial charge) + \$70 per hour. To find the hours, subtract the initial charge from the total and divide by the hourly rate: $300 - 50 = 250$, then $250 / 70 \approx 3.57$. Rounding to the nearest hour gives 4 hours.

Solve the Problem $50\$ 50$50 Plus $70\$ 70$70 Per Hour for Emergency Service

Solve the Problem $\$ 50$ Plus $\$ 70$ Per Hour for Emergency Service