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An investigator would find that scientists use the meteras a measure of length. This standard can be applied with a prefix to denote multiples or fractions of the standard. Let's look at a couple.

We'd see the term kilometer applied to mean 103 or 1,000 meters. You might measure the distance from, say, Denver, Colorado to Omaha, Nebraska using kilometers. It'd be about 870 kilometers (km).

A meter divided into a hundred equal parts is made up of 100 centimeters, as a centimeter is 10-2 or 1/100th of a meter. If you wished to express the diameter of, say, a United States quarter using this system, you'd say it was approximately 2.4 centimeters (cm) in diameter. Using 1/1000th of a meter (10-3 or a millimeter) to measure that quarter, you'd say it's diameter is about 24 millimeters, or 24 mm.

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