for x in range(100, 140, 10): canvas. draw_polygon ([(x, x), (x + 20, x), (x + 20, x + 20), (x, x + 20)], 2, "Black", "White")

Which are not examples of chronic or persistent stress? moving

Why is an outfitting a workspace with video games in a technology development company considered a strategic use of money

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)?