The aggregate supply curve (short run) is upward-sloping because . rev: 06_12_2018 Multiple Choice the price level is flexible upward but inflexible downward wages and other resource prices are flexible upward but inflexible downward per-unit production costs rise as the economy moves toward and beyond its full-employment real output wages and other resource prices match changes in the price level

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