Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapters 1-4 - Decimals - Test - Page 328: 26

Answer

Estimate: 50 - 47 = 3 Inch Exact: $3\frac{3}{8}$ inch

Work Step by Step

Difference in height = This yr height - last year height = 50 inch - $46\frac{5}{8}$ inch First Let's find estimate: $46\frac{5}{8}$ round to 47 (rounded to nearest whole number) Estimate: 50 - 47 = 3 Inch Now, Let's find Exact: = 50 inch - $46\frac{5}{8}$ inch = 50 inch - $\frac{46\times8+5}{8}$ inch = 50 inch - $\frac{373}{8}$ inch = $\frac{50\times8}{8} - \frac{373}{8}$ inch (LCM of 1 & 8 is 8) = $\frac{400}{8} - \frac{373}{8}$ inch = $\frac{400-373}{8}$ inch = $\frac{27}{8}$ inch = $3\frac{3}{8}$ inch
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