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Suppose that a certain fortunate person has a net worth of $71.0 billion ($7.10×1010). if her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?
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What is the number of neutrons in an atom with atomic mass of 35
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What is the half-life of an isotope that decays to 6.25% of its original activity in 18.9 hours?...
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