Answer
$-4.05 \times 10^{-9}$
Work Step by Step
Move the decimal point 9 places to the right to have $-4.05$.
Then, multiply $10^{-9}$ to retain the value:
$-4.05 \times 10^{-9}.$
Precalculus (6th Edition) Blitzer
by Blitzer, Robert F.
Published by
Pearson
ISBN 10:
0-13446-914-3
ISBN 13:
978-0-13446-914-0
Chapter P - Section P.2 - Exponents and Scientific Notation - Exercise Set - Page 30: 86
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