Final answer:
The difference of the elevations is 30347 feet.
Explanation:
Step 1
The highest elevation is 29028 feet.
Step 2
The lowest elevation is -1319 because it is below the sea level.
Step 3
The difference of the elevations is:
29028 - (-1319)
Step 4
Evaluate the value of expression:
29028 - (-1319) = 30347