(a) what is the key for r? (b) decompose r into 2nf relations. (use the names r1, r2, etc. for 2nf relations derived from r) (c) decompose the 2nf relations into 3nf relations. (use the names r1a, r1b, etc. for 3nf relations derived from r1) (use the names r2a, r2b, etc. for 3nf relations derived from r2) etc

In the film "epic 2015," epic is the name for:

Aconstruction company is creating a powerpoint presentation describing how they calculate costs during each construction step. they plan to email this presentation to clients. the individual clients will be watching the presentation slide show on their own personal computers. what is the most important formatting step the company should take to make the text readable and pleasing to the eye?

Researchers measured the data speeds for a particular smartphone carrier at 50 airports. the highest speed measured was 78.1 mbps. the complete list of 50 data speeds has a mean of x overbarequals16.11 mbps and a standard deviation of sequals18.65 mbps. a. what is the difference between carrier's highest data speed and the mean of all 50 data speeds? b. how many standard deviations is that [the difference found in part (a)]? c. convert the carrier's highest data speed to a z score. d. if we consider data speeds that convert to z scores between minus2 and 2 to be neither significantly low nor significantly high, is the carrier's highest data speed significant? a. the difference is nothing mbps.