Answer
$2.124.$
Work Step by Step
Using The Change-of-Base Formula ($\log_a{b}=\frac{\log_c{b}}{\log_c{a}}$) and then evaluating by a calculator:
$\log_{4}{19}=\frac{\ln{19}}{\ln{4}}\approx2.124.$
College Algebra (10th Edition)
by Sullivan, Michael
Published by
Pearson
ISBN 10:
0321979478
ISBN 13:
978-0-32197-947-6
Chapter 6 - Review Exercises - Page 500: 28
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