Answer
0.0000000021
Work Step by Step
When the exponent is negative, move the decimal that many places to the left to change from scientific notation to decimal form.
$2.1\times10^{-9}=0.\,\underleftarrow{0000000021}$
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: 38
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