If a light ray is traveling from air into a glass prism, how will the direction of the light ray change after it enters the prism? A. The light ray will be refracted toward the normal. B. The light ray will be refracted away from the normal. C. The light ray will be refracted perpendicular to the normal. D. The light ray will be refracted along the normal. E. The light ray will not be refracted.

Working alone at its constant rate, pump x pumped out ¼ of the water in a tank in 2 hours. then pumps y and z started working and the three pumps, working simultaneously at their respective constant rates, pumped out the rest of the water in 3 hours. if pump y, working alone at its constant rate, would have taken 18 hours to pump out the rest of the water, how many hours would it have taken pump z, working alone at its constant rate, to pump out all of the water that was pumped out of the tank? a) 6b) 12c) 15d) 18e) 24