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-6(-8b+7)=-90? Is it possible for a chemical reaction to happen instantly? In other words, is it possible for the time of a reaction be zero? Find the perimeter of the triangle defined by the coordinates (7, 1), (-6, 1), and (10, 6). (Round to nearest tenth)? A photon has a wavelength of 293 nm. Calculate the energy of the photon in joules. Enter your answer in scientific notation.? What is a good website for maths word problem for kindergarten students?