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The half-life of cesium-137 is 30 years. Suppose we have a 120-mg sample. (a) Find the mass that remains after t years. y (t) =

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The half-life of cesium-137 is 30 years. Suppose we have a 120-mg sample. (a) Find the mass that remains after t years. y (t) = mg (b) How much of the sample remains after 150 years? (Round your answer to two decimal places.) mg (c) After how long will only 1 mg remain? (Round your answer to one decimal place.) t = yr Need Help? Read It Watch It Master It

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