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: 47

Answer

(a) Estimate 72 inches Exact 71 inches (b) No

Work Step by Step

$17 \frac{3}{4} \times 4$ Estimate Round to nearest whole number. $18 \times 4 = 72$ Exact Convert to improper fraction $\frac{71}{4} \times \frac{4}{1}$ Reduce by common factor of 4 and multiply. $frac{71}{1} \times frac {1}{1}$ = $71 \times 1$ = 71 (b) Convert 6 feet to inches. $6 \times 12 = 72$ $72 \lt 71$ so a 6ft tall mechanic will not be able to walk under the vehicle without bending down.
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