What is the general equation of an ellipse centered at (h, k), with semi-major axis a, semi-minor axis b, and the foci located at (h Β± c, k), where c = β(a^2 - b^2)?
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Question: How many unit cubes are needed to build a rectangular prism with dimensions of length L, width W, and height H?
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Math question: Determine the derivative of f(x) = 3x^4 - 2x^3 + 5x^2 - 7x + 2.