If you make a typing error when entering a label, you a. highlight the cell and press delete. b. click on each cell and press delete and enter. c. start a new spreadsheet. d. click two times on the cell, use backspace, delete, and other keys to make the correction.

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)?

How can we take picture in this app

The heart of a computer.basic input/output systemselectmain memoryserial portcentral processing unit (cpu)