What kinds of applications are described here? What business functions do they support? How do they improve operational efficiency and decision making?

*Answer:
1. O(1)
2. O(n) - linear, where n is the size of the list
3. O(n^2) - exponential, where n is the size of the list
4. O(log(n)) - logarithmic, where n is the size of the list
5. O(1)