A graph representing a section of a roller coaster track is shown below. The function for this graph is f(æ) = 0.000512z³ – 0.0768z2 + 2.88x + 15. %3D 50 45 -40 -35 30 25 20 -15 -10 20 25 30 40 45 50 55 60 65 70 75 80 85 90 10 15 35 Part A: For what interval of the domain is the coaster dropping (going down / decreasing)? Part B: To the nearest meter, what is the maximum height of the coaster track? meters. The maximum height of the track is

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