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Question A radioactive substance has a decay rate of 0 . 0 7 3 per minute. How many grams of a 1 2 0 gram

Question

A radioactive substance has a decay rate of

0.073

per minute. How many grams of a

120

gram sample will remain radioactive after

30

minutes? Round the answer to the nearest tenth of a gram, and do not include the unit in your answer.

Note: the formula for radioactive substance is

W = M e^{- k t}

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