The part of a rocket engine that allows the combustion gases and flames to leave the rocket engine is the
a. nozzle.
b. plunger.
c. spigot.
d. tap.

Microsoft introduced active directory with windows 2000. in server 2012, it is in now version 4. what are some new features in the new ad that were not present in windows 2000 ad?

The blank button automatically displays next to the data when you select a range of numeric data which is an available option for creating a chart

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)?