A) what is creative commons?
b) what is cc by, cc by-nc and cc by-nc-sa

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)?

During the software planning process, rick, a project manager, finds that his team has made an incorrect estimation of funds. what kind of risk has rick identified? rick has identified a risk.