Allison notices the CD-ROM in the library and would like to use it to research information for her important term paper. Who should she ask about using the CD-ROM?

a. The Principal because the Principal buys all the school’s equipment
b. Her teacher because he will be grading the term paper
c. The Librarian because she manages all the school’s informational resources
d. The students in her class who have used the CD-ROM before

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)?

What is the best assassins creed game?

While inserting images, the picture command is usually used to insert photos from a digital camera, and the clip art command is usually used to a. edit the sizes and other characteristics of photos that have been inserted. b. take a screenshot of an image and copy it to the clipboard for pasting. c. search for drawings or other images from a library of prepared pictures. d. make illustrations using lines and shapes that are easy to manipulate.