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Write as a mathematical expression and evaluate. Subtract 17/18 from the product of 3 1/2 and 5 2/9.? When a gas reaches its condensation point it becomes a what? Assume a normal distribution for N = 300. How many cases would one expect to find between +1 and -1 standard deviations around the mean? If your DR. tells you that all blood pressure pills have side effects then WHY do they prescribe them ? Chemistry question?? How much heat energy does it take to make a sample of liquid nitrogen vaporize?