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Identify whether the following factors contributed to the rise or fall of Ghana.
invasion of Ghana
limiting gold
mining activities
losing control of
the gold-salt trade
gold deposits on land
near the Niger River
trade of gold
and kola nuts
taxing the gold-salt
trade route

How has the immigration of the 1990s affected the social and economic life of the united states?

What are the three criteria necessary to qualify for special education services under the individuals with disabilities education act category of intellectual disabilities? an intellectual functioning of 70 or more on a standardized iq test significant difficulty with tasks of everyday living (adaptive behavior) subaverage intellectual function (2 or more sd below the mean on a standardized iq test) impaired intellectual performance due to a traumatic brain injury deficits in intellectual functioning occur during the developmental period to distinguish id from other disabilities

What is the rule relating the ratio of marginal utility to prices of two goods at the optimal choice? explain why, if this rule does not hold, the choice cannot be utility-maximizing.