Math question: What is the measure (in degrees) of an angle subtended by an arc of length 40 units on a circle with radius 10 units?
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What is the equation of an exponential function that passes through the point (2, 8) and has a vertical asymptote at x = -3? Provide the answer in the form of y = a * b^x.
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Question: Find the domain of the trigonometric function f(x) = 3cos(2x) in radians. (