What is modeled by the graph segment between B and C? A graph with time on the x-axis and height on the y-axis. The graph increases from point A to point B, is constant between points B and C, increases between points C and D, and then decreases from point D to point E.

i think its the second one

Step-by-step explanation:

70

step-by-step explanation:

2*5=10

4*15=60

60+10=

70

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.