. A sample of bacteria was taken from a public restroom sink and was found to be tripling every 30 minutes. If the sample contained 12 bacteria, how many bacteria will be in the sample 4 hours from now? * 4 points 972 bacteria 34 bacteria 78,732 bacteria 3,072 bacteria

78,732 bacteria

Step-by-step explanation:

12 × 3^8 =78,732

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.