Question

In a household, a business is run for an average of 6 hours per day. The total power consumed by a computer and its printer is 245 watts. In addition, a 100-W light bulb runs during the same 6 hours. If their utility charges 11.75 cents per kWh, how much do the owners pay every 30-days?

The amount paid by the owner is $

Answer 1

7.30

steps

* A computer and printer use 245 watts total

* A 100W light bulb is also used for 6 hours per day

* The business runs for 6 hours per day

* So the total power used per day is:

- Computer + printer: 245W * 6h = 1470 Wh

- Light bulb: 100W * 6h = 600 Wh

- Total: 1470 Wh + 600 Wh = 2070 Wh per day

* The utility charges 11.75 cents per kWh

- 1 kWh = 1000 Wh

- So 11.75 cents per kWh = 0.1175 cents per Wh

* Over 30 days:

- Power used per day: 2070 Wh

- For 30 days: 2070 Wh * 30 days = 62,100 Wh

- Cost per Wh: 0.1175 cents

- Total cost: 62,100 Wh * 0.1175 cents/Wh = $7.30

Therefore, the total amount paid every 30 days is $7.30