Select the correct answer. Maggie is preparing a business report. Which type of keys will she use to type in letters, numbers, symbols, and punctuations?

A typing keys

B. navigation keys

C.

function keys

OD

control keys

Someone wishes to run the software on another computer system that runs an operating system that does not support the software what can he do

How do you take a green screen out of the video while editing?

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)?