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25-02-2016
Mathematics

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Suppose the circumference of a circle is 4π. What is its radius?

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apologiabiology apologiabiology

25-02-2016

circumference=pi times radius times 2
4pi=circumerence
4pi=pi times r times 2
divide both sides by pi
4=r times 2
divide both sides by 2
2=r
the radius is 2 units

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