How might learning about Mansa Musa and other ancient rulers affect people's perceptions of Africa?

It changed stereotypes

Explanation:

In earlier days Africa was seen as a continent not as developed as the rest of the world, being nomads and scavenging for food. With learning about Mansa Musa it is clear that Africa had many developed civilizations. Mansa Musa was extremely rich and it showed how complex Mali already was compared to early Europeans thinking of Africa being uncivilized.

so what is your question?

basically means the stoc market is going down since   dow is one of the most sucessful buiness it would be a tragedy for it to go down and it ensures the ruinty of the stock market