Please solve this for me.

x = 14

Step-by-step explanation:

Figure A to Figure B = 1:3.5 = 1/3.5

Therefore:

Side length of figure A to side length of figure B = 1/3.5

Thus:

4/x = 1/3.5

Cross multiply

x*1 = 3.5*4

x = 14

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.