Which area of the South had the highest percentage of the South’s slaves?

For President Jefferson, one of the most important reasons for the Louisiana Purchase was that it:

This was the name of the agreement between Spain and the United States in which Spain ceded Florida to the United States, and the border between the United States and Spanish Mexico was established:  

The term “Era of Good Feelings” refers to the period of American history when

All of the following factors contributed to American economic growth from 1820 to 1860 EXCEPT the

Why did the invention of the cotton gin increase the demand for slave labor?

What does it mean to be a “next practice organization”?

This man was chosen by John Quincy Adams to be his Secretary of State:  

Stewie has a business which manufactures time machines. However, he tells Brian he is upset because the type of manufacturing that he chose forces him to reprogram the machinery between batch production, which creates loss of revenue and time. Which type of manufacturing is Stewie most likely using? 

Between 1815 and 1860, southern production of cotton