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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 plane at an altitude of 21,000 feet?
The plane reaches an altitude of 21,000 feet minutes after liftoff

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Based on the formula that shows the change in altitude per minute, the number of minutes till the plane reaches and altitude of 21,000 feet is 6 minutes

How long does the plane take to reach 21,000 feet?

The number of minutes the plane takes to reach 21,000 feet is:

Altitude = 3,400x time + 600

Solving for time gives:

21,000 = 3,400t + 600

3,400t = 21,000 - 600

t = 20,400 / 3,400

t = 6 minutes

Find out more on altitude per minutes calculations at https://brainly.com/question/13780932

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