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Natural Number has the same Element as a Rational Number? True or False? An Interger (Z) is not a subset of an Irrational Number (Q') True or False? In Waste Water Engineering, why is Imhoff Cone conical? Why not use a simple measuring cylinder? If (3,4)(0,2) and (1, 4/3) all lie on the graph of a quadratic function, what is the x-coordinate of the vertex of the parabola? If you accidentally look at a reflection of the eclipse will it harm you?