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.
This video gives a brief description of the Songhai Empire of west Africa. The Songhai Empire was a state located in western Africa. From the early 15th to the late 16th century, Songhai was one of the largest Islamic empires in history.This empire bore the same name as its leading ethnic group, the Songhai.Its capital was the city of Gao, where a Songhai state had existed since the 11th century. Its base of power was on the bend of the Niger River in present day Niger and Burkina Faso.his empire bore the same name as its leading ethnic group, the Songhai. Its capital was the city of Gao, where a Songhai state had existed since the 11th century. Its base of power was on the bend of the Niger River in present day Niger and Burkina Faso.