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Find the maximum rate of change of f(x,y,z) = x + y/z at the point (-2, 3, 2) and the direction in which it occurs.? When potassium and sulfur react to produce an ionic compound, how many total electrons are transferred for each formula unit? Benefits of using fractional distillation? What is the solution set for x^2 + 4 = 6x? Fence to be built to enclose area of 20k ft Material costs 2.50 per ft for 2 sides, 3.20 per ft for other sides Find cost of least expensive?