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Can you lose your great great great grandparents DNA when you get older, or lose blood? How can I participate in Week Nuclear and Strong Nuclear fields? Multiplying powers, (1.2x10^4)(1.2x10^4) simplify.? Determine the values of a,b and c at which parabola y=ax^2+bx+c passing through point (1,1) has a tangent line with slope 7, at point 3,3 .? What is the formula weight of sodium chloride I get 58 but the answer is 62 so what am i missing?