What kind of report is a summary of a company's total sales over a five-year period? a product list
a market research report
a sales volume report
a customer list

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)?

Adrawing that places all lines parallel to the z axis at an angle from the horizon is 99 ! a. an oblique drawing b. a perspective drawing c. an auxiliary view d. a one-point perspective drawing

Does anybody know how to hack into a google account? i had important information on it and it is gone now and i need getting it back.