Evaluate
4\sqrt{5}\approx 8.94427191
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\frac{8\sqrt{5}}{2}
Factor 320=8^{2}\times 5. Rewrite the square root of the product \sqrt{8^{2}\times 5} as the product of square roots \sqrt{8^{2}}\sqrt{5}. Take the square root of 8^{2}.
4\sqrt{5}
Divide 8\sqrt{5} by 2 to get 4\sqrt{5}.
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