4. In a chemistry class, the students in a lab derived a function to model the results of their experiment on the effect of heat on a chemical where x represents the number of minutes heat was applied at a constant temperature set by the lab instructions. Their function was f(x) = -2° The 16x x +2 teacher said the function should have been 12x f(x) 2 x² +1 = a. Was there ever any time at which these two functions were the same. If so, when? b. For what values of x is their derived function greater than the actual function? c. Why would you not consider any x < 0 when looking for your answer to part b?

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