## Thinking Mathematically (6th Edition)

Published by Pearson

# Chapter 9 - Measurement - 9.1 Measuring Length; The Metric System - Exercise Set 9.1 - Page 585: 80

#### Answer

The Yangtze River is longer by 29 km.

#### Work Step by Step

We know that 1 mile = 1.6 kilometers. We can convert the length of the Yangtze River from units of miles to units of kilometers. $3940~mi = \frac{3940~mi}{1}\times \frac{1.6~km}{1~mi} = 6304~km$ The Yangtze River has a length of 6304 km. The Mississippi River has a length of 6275 km. The Yangtze River is longer by 29 km.

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