What is the equation of an exponential function that increases by a factor of 2 for every x-value increase of 1, and passes through point (0,3)?
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What is the length of a side of a triangle if its adjacent angle measures 40 degrees, the opposite angle is 80 degrees, and the opposite side is 6 units long?
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What is the sum of the real parts of the complex numbers (3+4i) and (-5-2i)?