10 POINTS FOR EACH PERSON WHO ANSWERS
Which statement accurately describes linked and embedded tables?
A. Both tables store information in the source file.
B. Only linked tables can be imported from Excel.
C. Only linked tables reflect changes made in the source file.
D. Both tables are a result of copying and pasting information.

Write lines of verse that rhyme to remember the following information: acid rain is a type of air pollution caused by chemicals in the air.

Which tab should you open to find the option for adding a header?

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)?