The table shows a person's heart rate after exercise has stopped. (a) Find values for the constants

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The table shows a person's heart rate after exercise has stopped. 


(a) Find values for the constants a, h, and k so that the formula f(x) = a(x - h)2 + k models the data, where x represents time and 0 ≤ x ≤ 4.image


(b) Evaluate f(1) and interpret the result. 


(c) Estimate the times when the heart rate was from 115 to 125 beats per minute.

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