Math question: For a circle with its center at the origin, find the y-coordinate of a point on the circle if its x-coordinate is 4, and the radius is 5.
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Question: Simplify √(18) + √(32) - √(12) + √(27) - √(50). How many like radicals can be combined? Express your answer using simplified radicals.
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What is the value of x for which the natural logarithmic function ln(x) is equal to log(x)?