A sample of a certain radioactive sample has relative decay rate is 2% per hour. After three days, the sample decayed to 4 micrograms. What was the original mass? Give an exact answer and an approximation

A sample of a certain radioactive sample has relative decay rate is

2%

per hour. After three days, the sample decayed to 4 micrograms. What was the original mass? Give an exact answer and an approximation to the nearest whole microgram. (Use a calculator for the approximation. )

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A sample of a certain radioactive sample has relative decay rate is 2% per hour. After three days, the sample decayed to 4 micrograms. What was the original mass? Give an exact …

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