31. Radioactive decay of material

  1. The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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  2. The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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  3. The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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  4. The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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  5. The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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  6. 5. The half-life of a certain radioactive material is 78 hours. An initial amount of the material has a mass of 790 kg. Write an
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  7. 6.The half-life of a certain radioactive material is 32 days. An initial amount of the material has a mass of 361 kg. Write an
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  8. The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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  9. The half-life of a certain radioactive material is 38 days. An initial amount of the material has a mass of 497 kg. Write an
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  10. The half-life of a certain radioactive material is 42 days. An initial amount of the material has a mass of 49 kg. Write an
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