1.) How do we describe the age strucure of a
population?
2.) What are the major social generations of the
United States?

PLEASE HELP ME!!!

Using complete sentences, explain the differences between a command economy and a market economy. what type of economic system is created when these two systems are combined? what are the benefits of combining these two systems?

Amountain created from tectonic activity would be considered which type of landform ? a) primary landform b) secondary landform

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal