Answer
$64$
Work Step by Step
According to the text, as we go down one octave, the frequency decreases by one half. So, two octaves below the middle C, the frequency will be
$256(0.5)^2=64$
College Algebra 7th Edition
by Stewart, James; Redlin, Lothar; Watson, Saleem
Published by
Brooks Cole
ISBN 10:
1305115546
ISBN 13:
978-1-30511-554-5
Chapter 8, Sequences and Series - Section 8.3 - Geometric Sequences - 8.3 Exercises - Page 616: 92
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