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The number of milligrams of a radioactive substance present after t years is given by the following equation. Q =100 e 0.036t (a) How many

The number of milligrams of a radioactive substance present after t years is given by the following equation.

Q =100 e 0.036t (a) How many milligrams are present after 0 years? (b) After how many years will there be 40 milligrams present? Give your answer to the nearest year. (a) There are D milligrams present after 0 years. (Simplify your answer.)

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