Precalculus (10th Edition)

Published by Pearson
ISBN 10: 0-32197-907-9
ISBN 13: 978-0-32197-907-0

Chapter 5 - Exponential and Logarithmic Functions - 5.4 Logarithmic Functions - 5.4 Assess Your Understanding - Page 295: 56

Answer

$\approx0.434$

Work Step by Step

By using a calculator $ \frac{\log15+\log20}{\ln15+\ln20}\approx0.4342944819\approx0.434.$
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