The temperature of water in a heating tea kettle rises according to the equation y = 30x

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The temperature of water in a heating tea kettle rises according to the equation y = 30x + 72, where y is the temperature (in degrees Fahrenheit) x minutes after the kettle was put on the burner.
(a) What physical interpretation can be given to the y-intercept of the graph?
(b) What will the temperature of the water be after 3 minutes?
(c) After how many minutes will the water be at its boiling point of 212°?
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Finite Mathematics and Its Applications

ISBN: 978-0134768632

12th edition

Authors: Larry J. Goldstein, David I. Schneider, Martha J. Siegel, Steven Hair

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