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1. A radioactive substance with an initial mass of 250mg has a half-life of 1 year. a) Write an equation to relate the mass of

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1. A radioactive substance with an initial mass of 250mg has a half-life of 1 year. a) Write an equation to relate the mass of radioactive material remaining to time. b) What mass will remain after 10 years? b) How long will it take for the sample to decay to 20% of its initial mass? Explain how you arrived at your answer. CS Scanned with CamScanner

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