Answer:
Monthly energy cost = $47.52
Explanation:
Given the following data;
Voltage = 120 Volts
Current = 8 Ampere
Time = 15 hours
Energy cost = $0.11/KWh
To find the energy cost for a month;
First of all, we would determine the power rating of the microwave oven.
Power = current * voltage
Power = 8 * 120
Power = 960 Watts
Next, we find the amount of energy consumed;
Energy = power * time
Energy = 960 * 15
Energy = 14400 Watt-hour
To kilowatt per hour, we have;
Energy = 14400/1000 = 14.4 KWh
Now, we determine the monthly energy cost;
Daily energy cost = Energy consumption * cost
Daily energy cost = 14.4 * 0.11
Daily energy cost = $1.584
Therefore, monthly energy cost = 1.584 * 30
Monthly energy cost = $47.52
Or
Monthly energy cost = 14.4 * 0.11 * 30
Monthly energy cost = $47.52
