Eli will photograph a wedding for a flat fee of ​$880 or for an hourly rate of ​$120. For what lengths of time would the hourly rate be less​ expensive? The hourly rate would be less expensive if the wedding was less than ___ hours long.

7 hours

Just divide 880/120 = 7.3333333

So if 7*120 = 840

An hour more would be more expensive.

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.