Answer
$ 0.0009$ is smaller.
Work Step by Step
We have
$$ 0.008= 8\times 10^{-3}, \quad 0.0009=9\times 10^{-4.}$$
Since the exponent $-4\lt -3$, then $ 0.0009$ is smaller.
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: 51
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