Mathematics
Mathematics, 05.05.2020 10:29, valeriekbueno

A radioactive element decays at a rate of 5% annually. There are 40 grams of the substance present. • How much of the substance remains after 30 years (to the nearest tenth)? • When will the amount of the substance drop to below 20 grams (to the nearest year)?

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A radioactive element decays at a rate of 5% annually. There are 40 grams of the substance present....

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