To plan ahead using reps and checks, choose the minimum space cushion needed to maintain following distance traveling 25 MPH

These factors limit the ability to attach files to e-mail messages. location of sender recipient's ability to open file size of file type of operating system used

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 smart devices benefit businesses, organizations, and social communities in the global marketplace?