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A gas has a volume of 6460 mL at 870 mm Hg and 77.2 C what is the volume of the gas at STP? Where does the graph of f(x)=x^2+2x-24 cross the x-axis? 1/2sin(x/2)-4cos(x)= -1? For what purpose would a world map of agricultural population density be especially useful? Why? Factor of x^2+15x+56+21/22^2?