Math

The half-life of a certain radioactive material is 38 days. An initial amount of the material has a mass of 497 kg. Write an exponential function that models the decay of this material. Find how much radioactive material remains after 4 days. Round your answer to the nearest thousandth.

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  1. A(t) = 497*(1/2)^(t/38)
    You can see that when t grows by 38, you multiply again by 1/2
    now plug in t=4

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  2. Y=497(1/2)^1/38x;462.029 kg
    I’m pretty sure
    I’m taking the test right now and this is my answer

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