There was a sample of 500 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by

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answerhappygod
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There was a sample of 500 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by

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There was a sample of 500 milligrams of a radioactive substance to start a study. Since then, the sample has decayed by 2.6% each year.
Let & be the number of years since the start of the study. Let y be the mass of the sample in milligrams.
Write an exponential function showing the relationship between y and t.
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