How is Tesla manufacturing different from any other manufacturing?

Which virus-infecting components are email messages prone to carry? one of the problems associated with the use of email communication is that email messages are prone to carry virus-infecting .

Who can provide you with a new password when you have forgotten your old one? your provide you with a new password in case you forget your old one.

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)?