What is your personal definition of life? How do you appreciate life?

Suppose there is a relation r(a, b, c) with a b+-tree index with search keys (a, b).1. what is the worst-case cost of finding records satisfying 10 < a < 50 using this index, in terms of the number of records n1, retrieved and the height h of the tree? 2. what is the worst-case cost of finding records satisfying 10 < a < 50 and 5 < b < 10 using this index, in terms of the number of records n2 that satisfy this selection, as well as n1 and h defined above? 3. under what conditions on n1 and n2, would the index be an efficient way of finding records satisfying the condition from part (2)?

From excel to powerpoint, you can copy and paste a. cell ranges and charts, one at a time. b. cell ranges and charts, simultaneously. c. charts only. d. cell ranges only.

How many different ways are there to order the eight jobs in the queue so that job usu comes somewhere before cdp in the queue (although not necessarily immediately before) and cdp comes somewhere before bbd (again, not necessarily immediately before)?