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How can i signup? Kick a ball of the roof of your house.It rolls off at a velocity of 12m/s.The roof is 21m high.How long does it take the ball to hit ground? 76 mL of 0.124 M KOH to neutralize 39.7 mL of H2SO4 solution. What is the concentration of the H2SO4 solution? how many sig figures? If chlorophyll is polar, why does it dissolve in hexane, which is non polar? The functions f and g are defined as f(x)=2x+9 and g(x)=1−10x. what is the domain of (f/g)(x)?