In which state does the mississippi river run

Which factor contributed to the rise of african empires such as ghana and mali?

What is generally true of the lower house in a state legislative branch ?

Which is relatively better: a score of 76 on a psychology test or a score of 22 on an economics test? scores on the psychology test have a mean of 90 and a standard deviation of 13. scores on the economics test have a mean of 52 and a standard deviation of 10.