kbri2se5ndaba kbri2se5ndaba

07-07-2016
Mathematics

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If the half-life of a sample of a radioactive substance is 30 seconds, how much would be left after 60 seconds?
a. one-fourth
b. half
c. one-eighth
d. you would need to know how many atoms you are starting with.

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Jisallyouget Jisallyouget

07-07-2016

the answer is a. one-fourth

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