A contractor is engaged to build steps up the slope of a hill that has the shape of the graph of y = x²(120 − x)/6400 for 0 ≤ x ≤ 80 with x in meters (Figure 23). What is the maximum vertical rise of a stair if each stair has a horizontal length of 1/3 m?

Transcribed Image Text:

40 20 20 40 60 80 ➤X