The half-life of a radioactive substance is 5000 years. In how many years, its activity will decay to 0.2 times of its initial value ? Given "log"_10 5 = 0.6990.

The half-life of a radioactive substance is 5000 years. In how many ye

1.	The half-life of a radioactive substance is 5000 years. In how many years, its activity will decay to 0.2 times of its initial value ? Given "log"_10 5 = 0.6990.
Answer» `1.16xx10^5` YEARS `1.16xx10^4` years `1.16xx10^3` years `1.16xx10^6` years ANSWER :B

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The half-life of a radioactive substance is 5000 years. In how many years, its activity will decay to 0.2 times of its initial value ? Given "log"_10 5 = 0.6990.

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