Confederations and unitary governments are among the alternatives to federalism. Unitary systems have one centralized governing body while in confederations, the state governments dominate over the less strict central government.
The answer is B. Because the Earth’s atmosphere is mostly nitrogen and oxygen.
1) x=9, because we can use the Pythagorean theorem, x^2 + 144 = 225, x^2 = 81
2) 
, because 6^2 +6^2 = 72, 
3) 
, because 
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The definition of strategy is a careful plan or method for achieving a certain goal.
