The cost function for a specified production process in terms of quantities u and v of the two process inputs is given by C(u, v) = 5u3 - 2u2v +3v2 + 800 dollars. (a) Write down the Gradient Vector of C(u,v) when u = 10 and v = 15 and estimate the change in the cost of the process if u increases from 10 to 10.4 and v decreases from 15 to 14.7.

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