Answer:
8 1/4
Explanation:
10 2/4 - 2 1/4= 8 1/4 . you have to find what 1/2 is in 10 1/2 which turns into 2/4 and then you do 10 2/4 - 2 1/4 and you subtract because it dropped in altitude which ends up with 8 1/4 miles
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