What is the equation of a circle with radius r and center (0, 0)? (
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What is the mode of the following data set: 5, 2, 8, 3, 5, 1, 5?
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Question: "What is the equation for the exponential function that has a y-intercept at (0, 4), and its graph passes through the points (2, 8) and (4, 64)?