The change in elevation of the airplane will be 9450 feets.
Rate of descent = 2700 feets per minute.
The elevation of the airplane after 3 1/2 minutes = 3.5 minutes will be :
- Rate of descent per minute × number of Minutes
Elevation after 3.5 minutes = 2700 × 3.5 = 9450 feets
The change in elevation of the airplane will be : 9450 feets towards the ground.
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