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What is the value of the expression of 1/2 divide 1/3 divide 1/4? Can a ray be part of a line in geometry? If I have a line with 3 points, can i say that the middle point and one of the endpoints is a ray? Can someone help me rewrite this expression using a single logarithm? Please give me the step by step. Thanks!! :)? What is the function of Calcium chloride? Somebody could tell me the relation between arqueology and biology?