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COIN: A shiny metal disc, almost always authorized by a national government entity, with a raised impression of famous dead people on one side and a building or birds on the other that is used as money. U.S. coins are issued by the U.S. Treasury Department and come in denominations of pennies, nickels, dimes, quarters, half-dollars, and dollars. At one time, metal coins were comprised of valuable metal (that is, commodity money) in an amount equivalent to their face value. A dime had 10-cents worth of silver. A nickel had 5-cents worth of nickel. A penney had 1-cents worth of copper. Most modern coins, however, are fiat money, containing less valuable metal alloys. But they work just fine in vending machines.
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AVERAGE-MARGINAL RELATION A mathematical connection between a marginal value and the corresponding average value stating that the change in the average value depends on a comparison between the average and the marginal. This mathematical relation between average and marginal surfaces throughout the study of economics, especially production (average product and marginal product), cost (average total cost and marginal cost), and revenue (average revenue and marginal revenue). A similar relation is that between a total value and the corresponding marginal value.
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GRAY SKITTERY
[What's This?]
Today, you are likely to spend a great deal of time at an auction trying to buy either a stretchable, flexible watch band or high-gloss photo paper that works with your printer. Be on the lookout for broken fingernail clippers.
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A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court!
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"When one door closes another door opens; but we do often look so long and so regretfully upon the closed door, that we do not see the ones which open for us. " -- Alexander Graham Bell, inventor
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FDA
Food and Drug Administration
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