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musickatia [10]
3 years ago
8

The altitude a (in feet) of a plane t minutes after liftoff is given by a = 3400t + 600. How many minutes after liftoff is the p

lane at an altitude of 21,000 feet
Mathematics
1 answer:
Aloiza [94]3 years ago
4 0

Answer:

6

Step-by-step explanation:

Altitude = 3400t +600

21,000 = 3400t +600

21000-600= 3400t

20400/3400 = 3400t/3400

t= 6

Answered by Gauthmath

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