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MATERIALS BALANCE: A hard and fast rule that the total amount of stuff removed from the natural environment will be eventually returned, probably as pollution. This is based on a fundamental law of physics that says material can be neither created nor destroyed, but only transformed. During any given period (such as a year) the quantity of materials returned to the environment is the difference between the quantity extracted and the quantity used by the economy.
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MARGINAL COST The change in total cost (or total variable cost) resulting from a change in the quantity of output produced by a firm in the short run. Marginal cost (MC) indicates how much total cost changes for a given change in the quantity of output. Because changes in total cost are matched by changes in total variable cost in the short run (total fixed cost is fixed), marginal cost is the change in either total cost or total variable cost. It is found by dividing the change in total cost (or total variable cost) by the change in output. Marginal cost is one of four cost concepts used in short-run production analysis. The other three are average total cost, average fixed cost, and average variable cost.
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ORANGE REBELOON
[What's This?]
Today, you are likely to spend a great deal of time waiting for visits from door-to-door solicitors seeking to buy either a rechargeable battery for your computer or shoe laces for your snow boots. Be on the lookout for vindictive digital clocks with revenge on their minds.
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This isn't me! What am I?
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Approximately three-fourths of the U.S. paper currency in circular contains traces of cocaine.
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"Argue for your limitations, and sure enough, they're yours." -- Richard Bach
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ROA
Return on Assets
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