Answer:
The line at PF represents the price floor
The line at PE represents the equilibrium price
The line between points A and B represents excess supply
Explanation:
Definition: a preliminary or preparatory statement; an introduction.
US Preamble: The Preamble of the United States Constitution, beginning with the words "We the people ", is a brief introductory statement of the Constitution's fundamental purposes and guiding principles.
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Answer:
By a "simpler model," he is referring to (a pseudo-environment).
Explanation:
the pseudo-environment is a person's mental picture of the world
