With half of west africa's population, which country experienced so much bad government that it went from an oil-rich, middle-income country to one of the world's poorest? a. ghana b. niger c. senegal d. nigeria

Based on this map, which statement about africa’s economic activity is most accurate? a) coastal countries are all members of opec b) economic development is more common with opec nations c) coastal countries have more access to productive resources d) economic development is more common above the sahara desert

Witch layer of the atmosphere has the most air pressure

The oldest seafloor in the atlantic ocean is located closest to the edge of the continents. explain how this age can be used to figure out when north america first began to separate from europe