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Please Help, Chemistry question. The 5 Geometries? Government need to tell the world there are aliens already.? What factories are the sources of used cooking oil for biodiesel production? Find the two x-intercepts of f(x)=x^2-4x and show that f'(x)=0 somewhere between them? What are the mean value and standard deviation of p̂ based on a random sample of size 440?