Final answer:
The difference in elevation between Mt. McKinley and Death Valley is 20,602 feet.
Step-by-step explanation:
The difference in elevation between Mt. McKinley and Death Valley can be calculated by subtracting the elevation of Death Valley from the elevation of Mt. McKinley.
Mt. McKinley is 20,320 feet above sea level, while Death Valley is 282 feet below sea level.
Therefore, the difference in elevation is:
20,320 - (-282)
= 20,320 + 282
= 20,602 feet.