Evaluate
5\sqrt{15}\approx 19.364916731
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\frac{5}{2}\times 2\sqrt{15}
Factor 60=2^{2}\times 15. Rewrite the square root of the product \sqrt{2^{2}\times 15} as the product of square roots \sqrt{2^{2}}\sqrt{15}. Take the square root of 2^{2}.
5\sqrt{15}
Cancel out 2 and 2.
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