104. The graph shows the height h (in meters) of a roller coaster t seconds after the ride starts. Height vs. Time 100 80 40 20 0. 10 20 30 40 50 60 70 Time (sec) a. Over what interval(s) does the height increase? b. Over what interval(s) does the height decrease? c. Estimate the times and values of any relative maxima or minima on the interval (0, 70). Height (ft)

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