Math question: What is the maximum value of the quadratic function f(x) = -2x^2 + 5x + 3 in the interval [-1, 4]?
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What is the area of a rectangular prism with dimensions 5 cm x 8 cm x 10 cm?
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Question: The equation f(x) = cos(x) describes a cosine function. Find the amplitude, period, and range of this function. How many x-intercepts does it have?