Answer
C. 11
Work Step by Step
We know that $\sqrt 121=11$, because $11^{2}=11\times11=121$.
We also know that $\sqrt 144=12$, because $12^{2}=12\times12=144$.
Therefore, $\sqrt 123.5$ must be between 11 and 12. Since $|123.5-121|
Intermediate Algebra (12th Edition)
by Lial, Margaret L.; Hornsby, John; McGinnis, Terry
Published by
Pearson
ISBN 10:
0321969359
ISBN 13:
978-0-32196-935-4
Chapter 7 - Section 7.1 - Radical Expressions and Graphs - 7.1 Exercises - Page 439: 7
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