Prealgebra (7th Edition)

Published by Pearson
ISBN 10: 0321955048
ISBN 13: 978-0-32195-504-3

Chapter 9 - Section 9.7 - Temperature and Conversions Between the U.S. and Metric Systems - Exercise Set: 31

Answer

The diskette is: $90\text{ mm}$ wide.

Work Step by Step

If we want to convert from inch to centimeters, we have to consider the following conversion rate: $ 1\text{ in}=2.54\text{ cm}$ We multiply both sides by $3\frac{1}{2}$ in order to get the answer to the question: $3\frac{1}{2} \text{ in} =3\frac{1}{2}\times 2.54\text{ cm}=8.89\text{ cm}$ After that, we convert from centimeters to millimeters: $1 \text{ cm}=10\text{ mm}$ We multiply both sides by 8.89: $8.89 \text{ ft}= 88.9\text{ mm}$ By rounding it to the nearest ten we can say that the diskette is: $90\text{ mm}$ wide.
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