Suppose that we have the following three tuples in a legal instance of a relation schema s with three attributes abc (listed in order): (1,2,: 3), (4,2,3), and (5,3,3).
1. which of the following dependencies can you infer does not hold over scherna s?
(a) a > 13, (b) be > a, (c) 13 > c 2.
can you identify all y dependencies that hold over s?

As with any small island country, cuba has fewer natural resources than countries such as brazil. this affects their economy in that cuba a) exports only manufactured products. b) exports more products than it imports.. c) must import more products than it exports. d) has imposed trade barriers against the united states.

Which of the following statements is false? a. a class can directly inherit from class object. b. if the class you're inheriting from declares instance variables as private, the inherited class can access those instance variables directly. c. a class's instance variables are normally declared private to enforce good software engineering. d. it's often much more efficient to create a class by inheriting from a similar class than to create the class by writing every line of code the new class requires.

20 points archie wants to use a reflector as he photographs a newlywed couple. what would he consider in his choice? a. shadow and sunny b. homemade and professional c. lamps and boards d. incident and reflected e. neutral density and enhancement