Answer:
9270 meters
Explanation:
We can use simple thought of number line (a vertical one) to answer this.
Let the sea level be positioned at 0.
Hence
Mount Everest will be 8840 ABOVE, and Dead Sea would be 430 BELOW
So, that means mount everest will lie at +8840 and Dead Sea would lie at -430 (in the number line).
The difference in elevation is thus 8840 - (-430) = 8840 + 430 = 9270 m