Conventional price elasticity of demand is a simplistic and elementary formula that has mathematical and economic deficiencies when applied to price (rates) and demand (balances) of deposit products: It does not recognize inverse relations between price and demand.
At its peak in 1300, the Mali Empire covered an area about twice the size of modern-day France and stretched to the west coast of Africa. In the late 19th century, during the Scramble for Africa, France seized control of Mali, making it a part of French Sudan.
Mali's decline happened because of the death of Mansa Musa, Berber nomads attacked the trade routes, and Songhai stopped paying taxes to the government. Songhai Definition: The greatest trade empire of west Africa. Significance to History: The Songhai empire lasted from 1400-1600 ce. Some major cities of Songhai were Gao and Timbuktu. Muslims leaders spread religion and invited scholars to study in the empire. Their primary religion was Islam. They were a really big trading empire.