Approximately how much of earth's history occurred during the precambrian super-eon?
a. 30%
b. 50%
c. 75%
d. 90%

How did the constitution of 1917 try to resolve some of the problems that started the mexican revolution

Which of the following statements would be supported by both a communist and a utopian socialist? a) a government should restrict the number of imports and exports to protect its gold reserves b) governments have no right to restrict the actions of businesses or customers c) society will shift towards socialist ideals without the need for violent revolutions d) the gains of the industrial revolution should be shared by all members of society

What was one effect of the emancipation proclamation on african americans in the north?