What are the characteristics of an ellipse given by the equation (x^2/a^2) + (y^2/b^2) = 1, where a represents the horizontal radius and b represents the vertical radius?
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What is the area of a triangle if the base is 7 units and the height is 4 units?
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What is the number of ways to arrange 6 students in a line out of a class of 30 students?