2. Mount Everest is 29,028 feet above sea level. The bottom of the Mariana Trench is 36,070 feet below sea level. What is the difference between these two elevations?

Step 1 ：The question is asking for the difference in elevation between the highest point on earth (Mount Everest) and the lowest point on earth (Mariana Trench). To find the difference, we need to add the absolute values of the two elevations because one is above sea level and the other is below sea level.

Step 2 ：Let the elevation of Mount Everest be \(29028\) feet above sea level.

Step 3 ：Let the elevation of the Mariana Trench be \(36070\) feet below sea level.

Step 4 ：To find the difference, we add the absolute values of the two elevations: \(29028 + 36070 = 65098\).

Step 5 ：Final Answer: The difference between the elevations of Mount Everest and the Mariana Trench is \(\boxed{65098}\) feet.