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Mathematics, 04.03.2021 19:00 RandomLollipop

A substance decays at 17% per day. After 9 days there are 19mg of the substance left.
How many
mg were there at the beginning?

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Answers: 3

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A substance decays at 17% per day. After 9 days there are 19mg of the substance left.
How man...
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