Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapter 2 - Multiplying and Dividing Fractions - 2.8 Multiplying and Dividing Mixed Numbers - 2.8 Exercises - Page 179: 45

Answer

Estimate 140 trips Exact 112 trips

Work Step by Step

$140 \div 1 \frac{1}{4}$ Estimate Round fractions to nearest whole number. $140 \div 1$ = 140 trips Exact Convert mixed numbers to improper fractions. $\frac{140}{1} \div \frac{5}{4}$ Multiply by the reciprocal of the divisor. $\frac{140}{1} \times \frac{4}{5}$ Reduce by the common factor of 5. $\frac{28}{1} \times \frac{4}{1}$ = $28 \times 4$ = 112 trips
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