In a relational database, the three basic operations used to develop useful sets of data are:. a. select, project, and join.
b. select, project, and where.
c. select, from, and join.
d. select, join, and where.

Melissa needs to add a topic to an email that she will send to her teacher. choose the name of the field where she should type her topic.

You draw two cards from a standard deck of 52 cards, but before you draw the second card, you put the first one back and reshuffle the deck. (a) are the outcomes on the two cards independent? why?

Technician a says that a new replacement part is always good. technician b says that sometimes recent repair work will be the cause of a complaint. who is correct? a. both technicians a and b b. technician a c. technician b d. neither technician a nor b