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please answer my question Question 11 (1 point) A certain radioactive substance has a half-life of 18 days. As a sample of the radioactive substance

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please answer my question

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Question 11 (1 point) A certain radioactive substance has a half-life of 18 days. As a sample of the radioactive substance decays, the percentage of radioactive substance remaining, at any time during the process can be modelled by the function P = 100(0. 5) 15 where t is the approximate age of the sample, in days. How many days will it take until there is only 25% of the original amount remaining

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