
Concept explainers
To write: the customary unit of length

Answer to Problem 3E
The distance across Tennessee should be measured in miles.
Explanation of Solution
Given:
Distance across Tennessee
There are 2 systems for measurement, one is customary system and other is metric system.
Customary has been used historically for various measurements, while metric system is widely accepted due to ease of calculations.
Various units of length in customary system are inch, foot, yard, mile etc.
Large distances like ‘distance across Tennessee' are very long and would be cumbersome to measure in small units.
Thus, it is reasonable to say that distance across Tennessee should be measured in miles.
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