An online travel agency such as travelocity is an example of a(n)

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)?

1. for which of the following are you not required to signal beforehand? a. changing lanes b. speeding up c. stopping

Type the correct answer in the box. spell all words correctly. what is the default margin width on all four sides of a document? by default, the document has a margin on all four sides.