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Air conditioners are rated by BTUs. You learned about BTUs in Lesson 8-2, Example 6. One watt-hour is equivalent to 3.413 BTUs per hour.
a. How many BTUs per hour are equivalent to a kilowatt-hour?
b. If an air conditioner is rated at 16,000 BTUs, how many watts does it require per hour? Round to the nearest 100 watts.
c. Express your answer to part b in kilowatt-hours.
d. If you run an air conditioner for 18 hours per day for 31 days in July, how many kilowatt-hours will it require for the month? Round to the nearest 100 kilowatt-hours.
e. Based on your answer to part d, and a rate of $0.13 per kilowatt- hour, estimate the cost of running the air conditioner for July to the nearest 10 dollars. |
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