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The half-life of cobalt 60 is 5.3 years. What fraction of a sample remains after 21.2 years?
A.
one half
B.
one quarter
C.
one eighth
D.
one sixteenth

Respuesta :

syed514
As given
21.2 / 5.3 = 4 times.
Hence,
 The answer would be
(1/2)^ 4
=1/16
So the answer is D

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