Financial Maths - Household expenses.
Test Yourself 1.
Electricity. | 1. Daria received two quotations for the supply and installation of an energy system in her home. They were $6,750 and $7,000.
By what percentage (to the nearest %) does the more expensive quote exceed the cheaper price? Answer.The second quote is higher than the first by 11%. |
2. An average laptop computer draws about 250 watts per hour.
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3. Richard is considering purchasing a new refrigerator and has narrowed down his choice to two options:
How much would Richard save in electricity in one year by purchasing the more efficient refrigerator? Assume that electricity charges will remain constant at 28.9 c/kWh. |
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4. The average household daily electrical use in Australia is 19.2 kWh. The average residential utility rate is 13c per kWh. Over a 90 day period, how much more would an average household pay for their electricity in Sydney compared to the average Australian cost?
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Water. | 7. |
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Gas. | 11. |