After 3 days a sample of radon-222 decayed to 58% of its original amount. (a) What is

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After 3 days a sample of radon-222 decayed to 58% of its original amount.
(a) What is the half-life of radon-222?
(b) How long would it take the sample to decay to 10% of its original amount?
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Contemporary Business Mathematics with Canadian Applications

ISBN: 978-0133052312

10th edition

Authors: S. A. Hummelbrunner, Kelly Halliday, K. Suzanne Coombs

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