Answer
$0.4$
Work Step by Step
We know that $a^{\log_a{x}}=x$.
Hence,
$2^{\log_2{0.4}}=0.4.$
Precalculus (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0-32197-907-9
ISBN 13:
978-0-32197-907-0
Chapter 5 - Exponential and Logarithmic Functions - Chapter Review - Review Exercises - Page 345: 20
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