Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

Chapters 1-4 - Decimals - Test - Page 328: 27

Answer

Estimate: 10 $\times$ 20 = 200 Dollars Exact: 191.90 Dollars

Work Step by Step

Hourly wage: Dollar 11.63 Hours worked = 16.5 Total earning = 11.63 $\times$ 16.5 Let's find Estimate: 11.63 (rounds to) 10 16.5 (rounds to) 20 Estimate: 10 \times 20 = 200 Dollars Let's Find Exact: 11.63 $\times$ 16.5 = $\frac{1163}{100}\times\frac{165}{10}$ = $\frac{1163}{100}\times\frac{33}{2}$ = $\frac{1163\times33}{100\times2}$ = 191.895 (By solving we get) Now, we need to round to nearest cent. 191.89 keep it and look for the thousandths place. It is 5, so we need to add 1 to the hundredths place. 191.89 + 0.01 = 191.90
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