PLEASE HELP DUE AT MIDNIGHT
#3

2787.6 (rounded to nearest tenth)

Step-by-step explanation:

The formula for the volume of a hemisphere is × × r³ where r is the radius of the hemisphere. You can apply the formula to answer the question.

Volume =   × × 11³

             = 887

             = 2787.6 (rounded to nearest tenth)

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.