## Basic College Mathematics (10th Edition)

Published by Pearson

# Chapter 7 - Measurement - Summary Exercises - U.S. and Metric Measurement Units - Page 504: 29

#### Answer

0.04 m; 4 cm; 40 mm

#### Work Step by Step

To find the taller is the tallest person than the second tallest, in meters The tallest person according to table is Robert Wadlow (1918–1940) USA whose height is 2.72 m The 2nd tallest person according to table is John Rogan (1868–1905) USA whose height is 268 cm The 2nd tallest person’s height is in centimeters so we need to convert centimeters into meters because tallest person’s height is in meters. Put the unit for the answer (meters) in the numerator of the unit fraction; put the unit you want to change (cm) in the denominator. Unit Fraction equivalent to 1 = (1 meter)/(100 centimeter) Multiply 268 cm times the unit fraction. 268 cm * (1 meter)/(100 centimeter) = 2.68 m The difference between the tallest and 2nd tallest person is 2.72 m – 2.68 m = 0.04 m To find the difference in centimeters Put the unit for the answer (centimeters) in the numerator of the unit fraction; put the unit you want to change (m) in the denominator. Unit Fraction equivalent to 1 = (100 centimeters)/(1 meter) Multiply 0.04 m times the unit fraction. 0.04 m * (100 centimeters)/(1 meter) = 4 cm To find the difference in millimeters Put the unit for the answer (centimeters) in the numerator of the unit fraction; put the unit you want to change (mm) in the denominator. Unit Fraction equivalent to 1 = (10 millimeters)/(1 centimeters) Multiply 4 cm times the unit fraction. 4 cm * (10 millimeters)/(1 centimeters) = 40 mm

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