Mathematics, 20.08.2021 03:00, xcji7384

Please help easy math 15 pts each 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 (answer) minutes after liftoff.

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Please help easy math 15 pts each The altitude a (in feet) of a plane t minutes after liftoff is g...