Write a in the form aequals=a subscript upper t baseline bold upper t plus a subscript upper n baseline bold upper natt+ann without finding t and n. bold r left parenthesis t right parenthesisr(t)equals=left parenthesis 5 plus 9 t right parenthesis bold i plus left parenthesis t minus 9 right parenthesis bold j minus 8 t bold k

If an improvement creates no significant change in a product’s performance, then it is a(n) ? a0 design improvement. (there are no answer choices)

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)?

What role did women fill during world war ii?