f a typical family of four uses electric energy at an average rate of 458 W, how many kWh would their electric bill be for one month?

Answer in kW

To calculate the electric bill for one month, we need to convert the average rate of energy consumption from watts (W) to kilowatts (kW) and then multiply it by the number of hours in a month.

Step 1: Convert watts to kilowatts
Divide the average rate of energy consumption in watts by 1000 to convert it to kilowatts.
458 W ÷ 1000 = 0.458 kW

Step 2: Calculate the energy consumption for one month
Multiply the average rate of energy consumption in kilowatts by the number of hours in a month. A typical month has 30 days, and each day has 24 hours.
0.458 kW × 30 days × 24 hours = 329.76 kWh

Therefore, the electric bill for one month would be approximately 329.76 kWh.