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Computer Science 10 Online
OpenStudy (anonymous):

If a radioactive nuclide has a half-life of 1.3 billion years and it is determined that a rock is about 3.9 billion years old, how many half-lives have elapsed since the rock crystallized?

OpenStudy (anonymous):

Half-life: 1.3b years Total time: 3.9b years How many times does the half-life fit into 3.9b years? Is the same question as: Time per game: 1.3 hours Time spent playing/watching games: 3.9 hours How many games were played?

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