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Author Question: Does anyone know how to find the coordinates of the vertex and graph the quadratics? (Read 1550 times) |
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.