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...Ch qxd am page chapter limits and continuity n economic injury level eil is a measure ment of the fewest number insect pests athat will cause damage to crop or forest it has been estimated that monitoring pest populations establishing eils can reduce pesticide use by accurate population estimates are crucial for determining density one in sect be approximated t d per plant where days since initial infestation what rate change this when equal section help answer question rates overview concept limit ideas distinguish calculus from algebra trigonometry we show how define calculate function values cal culation rules straightforward most need found substitu tion graphical investigation numerical approximation some combination these uses test functions continuous arise frequently scientific work because they model such an enormous range natural havior also have special mathematical properties not otherwise guaranteed you ll learn about average instantaneous speed moving body s during interv...