Meters are the the metric standard of length and are used in most of the world. In the United States, however, the U.S. customary system is used. Converting millimeters, or a thousandth of a meter, to inches may be necessary to make a metric measurement make sense to many Americans who may not be familiar with the metric system.
Instructions
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1
Write down 3.5 millimeters and the conversion factor to inches, which is 0.00393700787402.
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2
Multiply 3.5 times 0.00393700787402. Your answer will be 0.01377952755907.
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3
Round your answer to the decimal place that best suits the precision needed for your given application.