Evaluate
2\sqrt{1230}\approx 70.142711667
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2\sqrt{1230}
Factor 4920=2^{2}\times 1230. Rewrite the square root of the product \sqrt{2^{2}\times 1230} as the product of square roots \sqrt{2^{2}}\sqrt{1230}. Take the square root of 2^{2}.
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