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Author Question: At a price of $20, a store can sell 24 picture frames a day. At a price of $18 the store can sell 33 ... (Read 106 times) |
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The modern decimal position system was the invention of the Hindus (around 800 AD), involving the placing of numerals to indicate their value (units, tens, hundreds, and so on).
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.