$\"\"$

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To use the formula s = r $\"\"$ .

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First convert $\"\"$ in radian measure

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= $\"\"$

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= $\"\"$

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$\"\"$

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$\"\"$

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Then r = 9 feets and $\"\"$

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use the formula s = r $\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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$\"\"$

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The solution is 18.857 feets.