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Mathematics 11 Online
OpenStudy (anonymous):

If the radius of a circle is multiplied by 4, then how many times larger is the circumference of the new circle?

OpenStudy (anonymous):

the circumference is 2\[pi\]r=2*\[pi\]*4=8\[pi\]

OpenStudy (anonymous):

circumference is 2pi*r=2pi*4=8pi

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