The invention of the printing press increased the _ rate in fifteenth-century Europe. This invention made books more _ because they could be produced in larger quantities.

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

As water is cooled from 4 c to 0 c its density

What is the thickest layer of earth called?