- Is pollution that hair absorbs water soluble?

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El promedio de los números enteros que van de 300 a 600, ¿En qué cantidad mayor que el promedio de los números enteros que van de 100 a 200? Use polar coordinates to find the volume of the given solid.
Inside the sphere x^2 + y^2 + z^2 = 25 and outside the cylinder x^2 + y^2 = 4? How can we draw the free vector, a=2i-j, on a Cartesian xy plane? Compute the probability of randomly selecting a queen or seven.? Why last electron of lanthanide goes to d orbital instead of f orbital?