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A 500 mL sample of water is found to contain 0.02 g of Pb. What is the concentration of Pb in the solution? Please find the missing numbers for these Pythagorean Theorem questions and round to the nearest tenth if necessary.Please show all work? 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.? A positive angle less than 2pi that is coterminal with 23pi/3 is? Pedigree Question?