Science

In math, "pi" is equal to?

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Who was the commander of the first U.S. Space Shuttle mission?
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Which of these measurements would be different on Mars than on Earth?
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What is the process by which pollen is transferred from the anther to the stigma?
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What is it called when the Earth, Sun and Moon lie in a straight-line configuration?
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In which constellation was the first double star observed?
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About how often does Halley's Comet return?
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Which scientist died the same year Sir Isaac Newton was born?
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