Lee watches TV for 4 hours per day. During that time, the TV consumes 200 watts per hour. Electricity costs (12 cents)/(1 kilowatt-hour). How much does Lee's TV cost to operate for a month of 30 days?

Let's go through the calculation step by step:

### 1. Calculate Daily Energy Consumption:
The TV consumes 200 watts per hour. Since Lee watches TV for 4 hours per day, the daily energy consumption is:

\[
\text{Daily energy consumption} = 200 \text{ watts} \times 4 \text{ hours} = 800 \text{ watt-hours}
\]

To convert watt-hours to kilowatt-hours (kWh), divide by 1000:

\[
\text{Daily energy consumption} = \frac{800 \text{ watt-hours}}{1000} = 0.8 \text{ kWh}
\]

### 2. Calculate Monthly Energy Consumption:
Next, multiply the daily energy consumption by the number of days in the month (30 days):

\[
\text{Monthly energy consumption} = 0.8 \text{ kWh/day} \times 30 \text{ days} = 24 \text{ kWh}
\]

### 3. Calculate the Cost of Operating the TV for a Month:
The cost of electricity is 12 cents per kilowatt-hour. Therefore, the monthly cost is:

\[
\text{Monthly cost} = 24 \text{ kWh} \times 0.12 \text{ dollars/kWh} = 2.88 \text{ dollars}
\]

### Final Answer:
The cost to operate Lee's TV for a month of 30 days is **$2.88**.

Would you like further details or have any questions?

Here are 5 related questions for further practice:

1. How much would the cost be if the TV consumed 150 watts per hour?
2. If the electricity rate was 15 cents per kilowatt-hour, what would the monthly cost be?
3. How much energy does Lee's TV consume in a year?
4. If Lee watched TV for 5 hours per day instead, what would the monthly cost be?
5. What would be the monthly cost if the TV consumed 100 watts per hour?

**Tip:** Always remember to convert watts to kilowatts when calculating energy consumption costs, as electricity is typically billed in kilowatt-hours.

Learn how to calculate the cost of operating Lee's TV based on energy consumption. Lee watches TV for 4 hours daily, with the TV consuming 200 watts per hour. Understand the formula for energy consumption and how to calculate monthly costs. Suitable for high school students learning about electricity consumption and cost calculations.

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