Compare and contrast three aspects of growth in eastern cities in western cities in United States

What is the mercury length of time for one revolution around the sun?

Acivilization exists for several hundred yeaars, developing its own language. such a civilization probably has been: a. farming corn b. suffering from a lack of contact with the outside world. c. isolated by mountains or some other physical barriers. d. starving from lack of trade.

Can someone answer all these questions i need it done by tonight. once again