During slide show mode, hitting the b key will do which of these things?

a. move back one page

b. end your presentation

c. blank the screen with black screen (or return to the slide if you are currently blank)

d. move to the first page of your presentation

When creating a budget, log fixed expenses before income. after income. after savings. at the top.

Which is the highest level of the hierarchy of needs model? a. humanity b. intrapersonal c. team d. interpersonal

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)?