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The sum means that Eric is 3.3 m above sea level.
This is a way of taking the sum of two or more expressions.
Given the following parameters
An additional expression in the form of Descent + Ascent to represent this situation will be -13.7 + 15+ 2
Calculate the sum:
Sum = -13.7 + 15+ 2Sum = 3.3 meters
Hence the sum means that Eric is 3.3 m above sea level.
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