A radioactive material decays at a rate proportional to its amount. if the material has a half-life of 30 minutes, what percent of the original mass is expected to remain after 0.8 hours? A 22 percent B 28 percent 33 percent (D) 38 percent

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A: Simply use differential formula and we can easily solve it Please see the solution Thanks

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A: This question can be solved by using the values of x and y given in the table

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