MarMa6rlovemook MarMa6rlovemook

26-11-2016
Biology

Answered

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

Verified Answer :

syed514 syed514

28-11-2016

As given
21.2 / 5.3 = 4 times.
Hence,
The answer would be
(1/2)^ 4

=1/16
So the answer is D

Answer Link

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