Mathematics, 02.09.2020 04:01 MadisonElle

The altitude a ( in feet) of a plane t minutes after lift off is given by a=3400t+600 How many minutes after liftoff is the plane at an attitude of 21,000 feet?

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The altitude a ( in feet) of a plane t minutes after lift off is given by a=3400t+600 How many minu...