Question

A kilowatt hour means 1000 watts of electricity are being used continuously for 1 hour. The electric utility company in Laura’s town charges $0.03726 for each kilowatt hour used. Laura heats her home with five electric heaters that each use 1800 watts per hour. How much does it cost to heat her house for one day?

Answer 1

To calculate the cost of heating Laura's house for one day, you need to determine the total electricity consumption in kilowatt-hours (kWh) and then multiply it by the cost per kWh.

Each of Laura's five electric heaters uses 1800 watts per hour, which is equivalent to 1.8 kilowatts (1800 watts / 1000). Since she uses five of these heaters, the total power consumption per hour for all the heaters is:

Total Power Consumption = 1.8 kW/heater * 5 heaters = 9 kW

Now, to find the total power consumption for one day (24 hours), you need to multiply the hourly consumption by 24:

Total Daily Power Consumption = 9 kW * 24 hours = 216 kWh

Now, you can calculate the cost of heating her house for one day by multiplying the total daily power consumption by the cost per kilowatt-hour:

Cost = Total Daily Power Consumption * Cost per kWh

Cost = 216 kWh * $0.03726/kWh

Cost = $8.04096

So, it would cost Laura approximately $8.04 to heat her house for one day using five electric heaters at the given rate of $0.03726 per kilowatt-hour.