An air conditioning unit rated at 1000 watts operates for ten hours per day. What is the weekly electricity cost if the rate is five cents per kilowatt hour?

To determine the weekly electricity cost for the air conditioning unit, we first need to calculate its energy consumption in kilowatt-hours (kWh). The unit consumes 1000 watts, which can be converted to kilowatts by dividing by 1000. This gives us 1 kilowatt.

Next, since the air conditioning unit operates for ten hours a day, we can calculate the daily energy consumption as follows:

1 kilowatt × 10 hours = 10 kWh per day.

To find the weekly energy consumption, we multiply the daily consumption by the number of days in a week:

10 kWh per day × 7 days = 70 kWh per week.

Now, we can calculate the cost of this energy consumption at the rate of five cents per kilowatt-hour. We first convert this rate to dollars:

5 cents = $0.05.

By multiplying the total kilowatt-hours consumed weekly by the cost per kilowatt-hour, we find the total cost:

70 kWh × $0.05 = $3.50.

Here, however, the options you provided do not include $3.50. It seems there was a misunderstanding in the provided answer. The calculation shows the right approach to solving the problem, and