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Author Question: Suppose that a fast food restaurant wants the average line to be 4 customers and that 80 customers ... (Read 55 times) |
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There are 60,000 miles of blood vessels in every adult human.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.