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2. [3/5 Points] DETAILS PREVIOUS ANSWERS SCALCET8 3.8.010. A sample of a radioactive substance decayed to 93.5% of its original amount after a year. (Round

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2. [3/5 Points] DETAILS PREVIOUS ANSWERS SCALCET8 3.8.010. A sample of a radioactive substance decayed to 93.5% of its original amount after a year. (Round your answers to two decimal places.) (a) What is the half-life of the substance? 10.31 yr (b) How long would it take the sample to decay to 70% of its original amount? yr

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