Answer
$$1.6 \times 10^{-35}.
$$
Work Step by Step
By distributing the exponent on each factor, we have
$$
(2\times 10^{-9})^4=2^4 \times 10^{-36}=16 \times 10^{-36}=1.6 \times 10^{-35}.
$$
Elementary Technical Mathematics
by Nelson, Robert; Eren, Dale;
Published by
Brooks Cole
ISBN 10:
1285199197
ISBN 13:
978-1-28519-919-1
Chapter 2 - Section 2.6 - Scientific Notation - Exercises - Page 127: 66
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