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Find the slope of the curve y=-2x at (3,-18).? Find tan(A + B) given that cos A = -5/13 , with A in quadrant II, and with sinB =8/17 in quadrant II? 3. 20 ml. of aqueous solution of sulfuric acid contain 5g H2SO,. Density of the solution is 1.20 g/mL. Calculate the molality? I did my DNA test and learned my Dad is not my father. Now what do I do? I am trying to determine the accurate weight of a magnesium rod that has an 18mm radius and is 100mm long to check purity claim.?