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A curve connecting points of equal atmospheric pressure on a weather map is called an isobar. On a typical weather map the isobars refer to pressure at mean sea level and are given in units of millibars (mb). Mathematically, isobars are level curves for the pressure function
(a) Referring to the accompanying weather map, is the wind speed greater in Medicine Hat, Alberta or in Chicago? Explain your reasoning.
(b) Estimate the average rate of change in atmospheric pressure (in mb/mi) from Medicine Hat to Chicago. given that the distance between the two cities is approximately 1400 mi.
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Calculus: Early Transcendentals, Enhanced Etext
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