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Tangents and polar curves? What will be your reaction if someone got killed in front of you? Different ways to regulate metabolic pathways? What is the molarity of a sodium chloride solution, if 10.01 g of NaCl are dissolved in enough water to make 0.500 L of solution? What is the sum of 3x^3-2x+8, 2x^2 +5x, and x^3+2x^2-3x-3 ???? PLEASE HELP?