You have 7,160 grams of a radioactive kind of bismuth. How much will be left after 10 days if its half-life is 5 days?
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The half-life of bismuth is 5 days, which means that after every 5 days, the amount of bismuth will be reduced by half.
After 5 days, half of the bismuth will remain, so we will have: 7,160 grams / 2 = 3,580 grams.
After another 5 days (10 days total), half of the remaining bismuth will remain, so we will have: 3,580 grams / 2 = 1,790 grams.
Therefore, after 10 days, 1,790 grams of the radioactive bismuth will be left.