Answer
$1$
Work Step by Step
For any nonzero number $a,$ the number $a^{0}=1$.
Since $a=-9$ is a nonzero number,
$$(-9)^{0}=1 $$
Big Ideas Math - Algebra 1, A Common Core Curriculum
by Larson, Ron; Boswell, Laurie
Published by
Big Ideas Learning LLC
ISBN 10:
978-1-60840-838-2
ISBN 13:
978-1-60840-838-2
Chapter 6 - Exponential Functions and Sequences - 6.1 - Properties of Exponents - Monitoring Progress - Page 292: 1
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