Stores of data that are so vast that conventional database management systems cannot handle them, and very sophisticated analysis software and supercomputing-level hardware are required, are known as these data include not only data in corporate databases but also web-browsing data trails, social network communications, sensor data, and surveillance data. a. cyber-age databasesb. big datac. mega itd. super datae. new age computing

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)?

Jace needs to answer a question on square roots to win a quiz. how can he use a spreadsheet to find the square root of 786? a. use the functions round and count b. create a table and chart c. use the function sqrt d. use the function now

2. fluorine and chlorine molecules are blamed fora trapping the sun's energyob forming acid rainoc producing smogod destroying ozone molecules