Charlie uses the function f(x) = 2x2 + 5x + 3 to track the temperature of a substance, where x represents the time. When you evaluate f(5) you find that the temperature of the substance is 78°C. What is

asked Oct 7, 2019 229k views

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I would think it would be all real non zero numbers. I mean if x is time you can't have negative time, right?

Solomon Vimal answered Oct 12, 2019

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