A market is in equilibrium if at the market price the quantity demanded is equal to the quantity supplied. The price at which the quantity demanded is equal to the quantity supplied is called the equilibrium price or market clearing price and the corresponding quantity is the equilibrium quantity.
I am assuming that horses' is plural.
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If it were singular, it would be horse's.
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Sinces is it written s',it is plural.
<span>"C. III. Biological Effects" uses the technically correct capitalization for an outline entry, but it should be noted that outlines can really take any form that you wish. </span>
