trinityroberts4 trinityroberts4

13-12-2014
Mathematics

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The radius of a circular sign is decreased by 4 inches. If r represents the radius of the original sign, which equation represents the area, in square inches, of the smaller sign?

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mrudzki mrudzki

13-12-2014

[tex]Area\ of\ the\ circle:\\A=\pi r^2\\\\then\ the\ expression\ presenting\ the\ smaller\ a\ reairs:\\\\(r-4)^2\pi[/tex]

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