The difference between the highest and lowest elevations.
Answer to Problem 39SGR
Explanation of Solution
Given:
The lowest elevation for the North America is
Concept Used:
Rule of Addition:
- Two numbers with similar sign always get added and the resulting number will carry the similar sign.
- Two numbers with opposite signs always get subtracted and the resulting number will carry the sign of larger number.
In order to find the difference between the highest and lowest elevations of the North America, subtract the lowest elevation from the highest elevation. So, the difference between the elevation is given by
To solve this expression, first distribute negative sign inside the parenthesis and simply further by combining the numbers as shown below:
Thus, the difference between the highest and lowest elevations is
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