Explain the function of Really Simple Syndication feeds (RSS)?​

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)?

22. sata3 allows for data transfer rates of 600 mb/s. explain why you would likely not be able to copy data from one hard drive to another at anywhere close to this speed. also, what could be upgraded on the computer to achieve transfer speeds closer to 600 mb/s

Arah has entered data about football players from team a and team b in a worksheet. she enters names of players from team a with details about each player in different columns of the worksheet. similarly, she enters details of all the players from team b. which option will her view the data for team a and team b in two separate sections after printing? a. page break view b. freeze pane view c. split screen view d. full screen view e. zoom out view