Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 9 - Measurement - Chapter Summary, Review, and Test - Review Exercises: 51

Answer

c. 200 g

Work Step by Step

There is a large hamburger called a quarter-pounder. This name means that a quarter-pound of beef is used to make the hamburger. We know that $1~lb \approx 0.45~kg$. We can convert the weight of a quarter-pound of beef to units of kilograms. $\frac{1}{4}~1~lb = \frac{1~lb}{4}\times \frac{0.45~kg}{1~lb} = 0.1125~kg$ To convert from kilograms to grams, we need to move the decimal point 3 places to the right. $0.1125~kg = 112.5~g$ If the beef weighs 112.5 grams, then it would be reasonable to estimate that the whole hamburger weighs about 200 grams.
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