Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 1 - Whole Numbers - 1.10 Solving Application Problems - 1.10 Exercises - Page 96: 30

Answer

The approximate total cost is \$15,000. The exact total cost is \$14,868.

Work Step by Step

Estimate the cost to purchase 17 laptops by rounding the cost per laptop, rounding the number of laptops then multiplying the two numbers. 506≈500 $17 \approx 20$ 500×20=10,000 Estimate the cost to purchase 13 printers by rounding the cost per printer, rounding the number needed, then multiplying the two numbers. 482≈500 13≈10 500×10=5,000 Find the total approximate cost by adding together the approximate cost for laptops and the approximate cost for printers. 10,000 + 5,000 = 15,000 Find the exact cost to purchase 17 laptops by multiplying the cost per laptop by 17. 506×17=8,602 Find the exact cost to purchase 13 printers by multiplying the cost per printer by 13 482×13=6,266 Find the total cost by adding together the cost for laptops and the cost for printers. 8,602 + 6,266 = 14,868
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