A constant is a letter that is not a vowel...vowels are A,E,I,O,U and sometimes Y...
<span>The main difference of both types of competitions is the structure of the company. Perfect competition is a part of microeconomics that describes a structure of the market that is controlled entirely by market forces or consumers. While imperfect competitions feature competitive markets where oligopoly is an example. This is were fewer sellers of a product are present in the market based on its current status or structure. Perfect competition is a theoretical type of model of economics because a lot of markets today in society almost always involves imperfect competitions. </span>
The primary geographical feature that served as a boundary to westward settlement in 1760 was the Appalachian Mountains, since these were very high and treacherous and gave people very little incentive to cross.
