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Mathematics, 19.04.2020 05:13 Dreynolds1667

28. The half-life of thorium-229 is 7340 years. How long will it
take for a sample of this substance to decay to 20% of its original amount?

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28. The half-life of thorium-229 is 7340 years. How long will it
take for a sample of this subs...

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