Final answer:
The change in elevation from 8500 meters to 3400 meters is -5100 meters.
Step-by-step explanation:
To find the change in elevation from 8500 meters to 3400 meters, we need to calculate the difference between the two elevations.
Difference = Final Elevation - Initial Elevation
Difference = 3400 - 8500
Difference = -5100 meters
The change in elevation is -5100 meters.