#### Answer

estimated = 42
rounding off = 42.03

#### Work Step by Step

After rounding off the estimate is simplified as
$\frac{0.2 * 105}{0.5}$ = 42
The actual calculation is $\frac{0.19996 * 107}{0.509}$ = 42.03

Published by
Pearson

ISBN 10:
0321867327

ISBN 13:
978-0-32186-732-2

estimated = 42
rounding off = 42.03

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