Answer:
The difference between these two elevations is 30,340 feet.
Step-by-step explanation:
To find the answer you would take the first elevation: 29,028 and subtract it by negative 1,312 because the the second elevation is below sea level which would be negative.
29,028--1,312 but because you're subtracting a negative, it would be the same thing if you would take the minus and the negative and make it plus a positive.
29,028+1,312=30,340