Currently how many humans are born on the planet each year? (1 point) 25 million
40 million
50 million
75 million

The most common economic system in the world is aclosed economy. command economy. mixed market economy. traditional economy.

Gemstones are commonly found in pegmatites, which are igneous rocks that are a. exceptionally mafic b. exceptionally coarse grained c. exceptionally fine grained d. extrusive, forming from lava

Which of the following describes what rocks usually are composed of ,