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29 April, 10:35

A substance has a half-life of 6 years. If 20 pounds are present initially, how much will remain after 2 years?

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  1. 29 April, 10:52
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    16.66pound

    Step-by-step explanation:

    roughly 16.66 pound

    if in 6 years it become half which is = 10

    then 10:6 = 1.67

    then 1.67 pound is decayed every year.

    in 2 years it decay 1.67*2 = 3.34

    so, the remaining is 20-3.34=16.66pound
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