Mathematics, 12.02.2021 03:50 oliviac0327

A radioactive substance decays in a manner so that at time t = 50 days, 30% of the substance remains. What is the amount after
20 days, if the initial amount was 242.8 g?

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A radioactive substance decays in a manner so that at time t = 50 days, 30% of the substance remain...