Answer:
11,703 feet
Step-by-step explanation:
Since absolute value is never negative, just add the distances to get the full span. Just think of above sea level as positive and below sea level as negative.
36 - (-20) = 56
SO the number that should be added to -20 to get the answer of 36 is 56.
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C^2 = a^2 + b^2
The formula for the pythagorem theory