Http://codersindex. com/cpp-challenge-29/ Hello I'm a self taught C++ coder, this is my first year learning this, but I am in a bit of trouble, and I need some help on milestone 2.

What part of the interface displays the external references contained in a selected cell? the status bar the review tab the scroll bar the formula bar

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)?

Which of the following would not be considered a pc? a. mainframe b. desktop c. tablet pc d. laptop