Describe the differences between a half-adder and a full-adder identify the types and quantity of gates needed to implement each type of adder circuit either create (or give the location in the text) of a logic diagram of each of the adder circuits

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)?

1. for which of the following are you not required to signal beforehand? a. changing lanes b. speeding up c. stopping

Carmina works at a fast-food restaurant. during the slow afternoon hours, carmina always find projects to keep her busy, like washing all the trays or deep-cleaning the drive-thru area. what workplace habit does carmina show by doing this? efficiency initiative interpersonal skills problem solving