This area is located around the equator is relatively calm

Who came up with the theory of evolution

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.

The standard deviation of a population is 3.2.what is the margin of error? enter your answer in the box.