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9 cubic units

Step-by-step explanation:

This cube is 3 by 3 by 3 units.

The volume of a 3 dimensional rectangular prism (or in this case a square prism) is the length*width*height.

3*3*3=9

9 cubic units.

36

Step-by-step explanation:

Length times Width times height

Width = 4

Height = 3

Length = 3

Multiply all and you get 36

step-by-step explanation:

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.