The table T(A, B, C, D) has a B-tree index on the column B. Which of the followine requests may benefit from the index? Where necessary, define additional conditions under which the index will be beneficial. If the query cannot benefit from the index, suggest other solutions for improving its performance. a. SELECT * FROM T WHERE B = x; b. SELECT * FROM T WHERE B <> x; c. SELECT * FROM T WHERE B LIKE 'x'; d. SELECT * FROM T WHERE SUBSTRING(B, 1, 1) 'x'

Which of the following methods could be considered a “best practice” in terms of informing respondents how their answers to an on-line survey about personal information will be protected? respondents are informed that investigators will try to keep their participation confidential; however, confidentiality cannot be assured. respondents are informed that a research assistant will transfer all the research data to a password-protected computer that is not connected to the internet, via a usb flashdrive. the computer is located in a research team member’s office. the investigator uses the informed consent process to explain her institution’s method for guaranteeing absolute confidentiality of research data. the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents’ ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed.

What does a cascading style sheet resolve a conflict over rules for an element? a. the rule affecting the most content wins b. the rule affecting the most content loses c. the rule with the most specific selector loses d. the rule with the most specific selector wins

Ihave been given the number of guns per 100, and the total firearm-related deaths per 100,000. i have to find the actual number of guns per country and actual number of gun-related deaths. if somebody could show me how to do 1 question, i can finish the rest, i am just confused. tia