What is the dot product of vector u = (3, -2) and vector v = (4, 5)?
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What is the average temperature in degrees Celsius for the past week, given the following daily temperatures: 15°C, 18°C, 21°C, 20°C, 17°C, 16°C, and 19°C?
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What is the value of f(x) = 3x^2 + 2x + 1 when x = 4?