What is the radian measure of an angle that subtends an arc of length 5 units in a circle with radius 2 units?
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Write a math question for the theme "Characteristics of quadratic (square) function f(x) = x^2": What is the vertex form of the quadratic function f(x) = x^2? Provide an example of vertex coordinates and explain how the "a" value affects the graph of the function.
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What is the equation of an ellipse centered at (2, -3), with major axis length of 10 units and minor axis length of 6 units?