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What is the reaction of: NaOH +H3BO3? If measure of angle A = 60 and AB = 5, then BC = ? Bilanciare: MnO4(-) + C2O4(+) + H(+) -> Mn(2+) + CO2 +H2O? What date was last solar eclipse that was visible in louisiana? If the ratio of the lengths of the corresponding sides of two similar polygons is 2:3, then the ratio of their areas is ?