Robert’s computer is not working properly. it has become too slow to respond to programs. what can he do to maintain his computer well?
use database software
use word-processing software
use utility software
use presentation software
use spreadsheet software

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)?

How many points do i need before i can send a chat

@josethesolis i need can anyone text me and follow me