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X^2 + x - 30 = 0, solve? Calculate the wavelength (in nanometers) of a H atom (mass = 1.674 × 10−27 kg) moving at 3.75 × 102 cm/s.? If two dice are thrown, in how many ways can the sum of 13 come out? F I wanted to arrange 8 blocks in a row, how many different arrangements can I make? What types of cells are produced from mitosis?