Is a machine which can take instructions, and perform computations based on those instructions. what is the answer for this question

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)?

Intellectual property rights are exclusive rights that protect both the created and the creation. ipr offers exclusively what benefits to the person or people covered by it

List at least one thing to check for when you're checking the clarity and professionalism of a document.