Utilities and Electricity Costs

Tim’s January water bill listed two meter readings. The previous reading was 14,498 ccf and the present reading is 14,921 ccf. How much water did Tim’s household use during the billing period?

Tim’s February water bill listed two meter readings. The previous reading was 1,234 ccf and the present reading is 1,441 ccf. How much water did Tim’s household use during the billing period?

Tim’s March water bill listed two meter readings. The previous reading was 21,428 ccf and the present reading is 23,221 ccf. How much water did Tim’s household use during the billing period?

The Smith’s old water heater cost them $595 per year to run. The new one they purchased for $1,440 will save them 26% annually in energy costs to run it. In how many years will it pay for itself?

The Smith’s old washing machine cost them $178 per year to run. The new one they purchased for $1,245 will save them 12% annually in energy costs to run it. In how many years will it pay for itself?

The Smith’s old air conditioning cost them $585 per year to run. The new one they purchased for $9,210 will save them 52% annually in energy costs to run it. In how many years will it pay for itself?

Mack purchased a desktop computer with a monitor for $1,300. He always leaves both in the power up mode. On average, his model and make costs $75 per year to run in electricity costs when it is constantly on. What is the average yearly cost to own and operate this computer system at the end of 4 years?

Mack purchased a desktop computer with a monitor for $2,775. He always leaves both in the power up mode. On average, his model and make costs $125 per year to run in electricity costs when it is constantly on. What is the average yearly cost to own and operate this computer system at the end of 9 years?

Mack purchased a desktop computer with a monitor for $799. He always leaves both in the power up mode. On average, his model and make costs $75 per year to run in electricity costs when it is constantly on. What is the average yearly cost to own and operate this computer system at the end of 3 years?

The refrigerator requires 500 watts at all times. How much does it cost to run it for a day (convert to minutes) at a cost of $0.16 per kilowatt-hour?