Concept explainers
Reading Meters The figure shows how to read an electric meter.
Step 1 Start with the dial on the right. If the arrow falls between two numbers, use the smaller number on the dial (except when the dial is between 9 and 0, then use the 9). Notice the arrows above each dial indicate the direction the dial is moving (clockwise, then counterclockwise).
Step 2 If the pointer is directly on a number, check the dial to the right to make sure it has passed 0 and is headed toward 1. If the dial to the right has not passed 0, use the next lower number. The number on the meter on the left is 16064.
Suppose your previous month's reading was as shown on the left, and this month's meter reading is as shown below.
a. Determine this month's meter reading.
b. Determine your electrical cost for this month by first subtracting last month's meter reading from this month's meter reading (measured in kilowatt hours), and then multiplying the difference by the cost per kilowatt hour of electricity. Assume electricity costs 24.3 cents per kilowatt hour.
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Elementary Algebra For College Students (9th Edition)
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