Mathematics, 05.05.2021 14:00 BriP5022

The mass of an isotope decreases at a rate that is proportional to the mass at that time. The mass of the isotope was 40 grams initially, and it was 10 grams after 16 days.
What was the mass of the isotope after 20 days?

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The mass of an isotope decreases at a rate that is proportional to the mass at that time. The mass of the isotope was 40 grams initially, and it was 10 grams after 16 days. What was the mass of the isotope after 20 days?

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Another question on Mathematics

The mass of an isotope decreases at a rate that is proportional to the mass at that time. The mass of the isotope was 40 grams initially, and it was 10 grams after 16 days.
What was the mass of the isotope after 20 days?