Question

A refrigerator in a house uses 0.5 kilowatt for 6.8 hour. If electricity costs $0.45 per kilowatt-hour, how much does it cost to use the refrigerator?

Answer 1

The cost to use a refrigerator that consumes 0.5 kilowatt for 6.8 hours at $0.45 per kilowatt-hour is $1.53.

Step-by-step explanation:

To calculate the cost to use a refrigerator that uses 0.5 kilowatt for 6.8 hours at an electricity cost of $0.45 per kilowatt-hour, you can follow these steps:

1. Multiply the power consumption in kilowatts (kW) by the time in hours to get the total energy consumption in kilowatt-hours (kWh). 0.5 kW * 6.8 hours = 3.4 kWh.
2. Multiply the total energy consumption in kWh by the cost per kWh to get the total cost of operation. 3.4 kWh * $0.45/kWh = $1.53.

Therefore, the cost to use the refrigerator for 6.8 hours is $1.53.