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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.

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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

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The average office desk has 400 times more bacteria on it than a toilet.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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