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25 July, 20:03

In a lab experiment, the decay of a radioactive isotope is being observed. At the beginning of the first day of the experiment the mass of the substance was 1100 grams and mass was decreasing by 10% per day. Determine the mass of the radioactive sample at the beginning of the 13th day of the experiment. Round to the nearest tenth (if necessary).

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  1. 25 July, 23:53
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    a13=310.7

    Step-by-step explanation:

    Formula = an=a1r^n-1

    a13=1100 (0.9) 13-1

    a13=310.7
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