Answer
$$0.49
$$
Work Step by Step
Using Eq. $42-15$ with Eq. $42-18$, we find the fraction remaining:
$$
\frac{N}{N_{0}}=e^{-t \ln 2 / T_{1 / 2}}=e^{-30 \ln 2 / 29}=0.49
$$
Fundamentals of Physics Extended (10th Edition)
by Halliday, David; Resnick, Robert; Walker, Jearl
Published by
Wiley
ISBN 10:
1-11823-072-8
ISBN 13:
978-1-11823-072-5
Chapter 42 - Nuclear Physics - Problems - Page 1304: 32
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