The weight w (in tons) of fuel in a rocket after launch is w = 2000

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The weight w (in tons) of fuel in a rocket after launch is w = 2000 − t2 − 140t, where t is the time (in min). During what period of time is the weight of fuel greater than 500 tons?

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Basic Technical Mathematics

ISBN: 9780137529896

12th Edition

Authors: Allyn J. Washington, Richard Evans

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