Physics, 19.10.2021 14:00 191600

The amount of a radioactive isotope present in a certain sample at time t is given by A(t) = 500e^-0.02828t grams, where t years is the since the initial amount was measured. How long will it take for the amount of the isotope to equal 317 grams

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The amount of a radioactive isotope present in a certain sample at time t is given by A(t) = 500e^-0...