Siona needs to make sure her ads are getting a minimum number of impressions on the top of the page. What type of automated bidding strategy is Siona using?

Some of the first computer games were created in the early 1970s by college students experimenting after hours to see what the were capable of doing.

This is not a factor that you should use to determine the content of your presentation. your audience your goals your purpose your technology

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)?