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GOLD CERTIFICATE: Paper currency issued by the U. S. Treasury from the civil war until 1933 that could be exchanged for an equal value of gold. Gold certificates were used as part of a gold standard. With the exception of collectors, gold certificates have long been out of circulation, replaced first by silver certificates, then in the past few decades by Federal Reserve notes.

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ARC ELASTICITY

The average elasticity for discrete changes in two variables. The distinguishing characteristic of arc elasticity is that percentage changes are calculated based on the average of initial and ending values of each variable, rather than initial values. Arc elasticity is generally calculated using the midpoint elasticity formula. The contrast to arc elasticity is point elasticity. For infinitesimally small changes in two variables, arc elasticity is the same as point elasticity.

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Today, you are likely to spend a great deal of time going from convenience store to convenience store hoping to buy either arch supports for your shoes or an AC adapter that works with your MPG player. Be on the lookout for empty parking spaces that appear to be near the entrance to a store.
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A half gallon milk jug holds about $50 in pennies.
"Success is where preparation and opportunity meet."

-- Bobby Unser, Race car driver

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