The table shows the national health expenditures (in billions of dollars) for the Department of Veterans Affairs

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The table shows the national health expenditures (in billions of dollars) for the Department of Veterans Affairs x, workers’ compensation y, and Medicaid z from 2009 through 2014.


image


A model for the data is given by z = -0.120x2 + 0.657y2 + 17.70x - 51.53y + 842.5.


(a) Find 


image(b) Determine the concavity of traces parallel to the xz-plane. Interpret the result in the context of the problem.


(c) Determine the concavity of traces parallel to the yz-plane. Interpret the result in the context of the problem.

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Calculus Of A Single Variable

ISBN: 9781337275361

11th Edition

Authors: Ron Larson, Bruce H. Edwards

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