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Author Question: Carol is having difficulty with subtraction problems. Over a five-day period, out of 20 problems, ... (Read 489 times) |
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
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The horizontal fraction bar was introduced by the Arabs.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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Less than one of every three adults with high LDL cholesterol has the condition under control. Only 48.1% with the condition are being treated for it.
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Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.