- 0.5p + 20,
If the demand function is Qd = - 0.5p
calculate the quantity demanded when price is
$15.00.
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An economy is a system of making and trading things of value. It is usually divided into goods (physical things) and services (things done by people). It assumes there is medium of exchange, which in the modern world is a system of finance. This makes trade possible.
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