PLSSS HELP We know the current is changing over time. Which of these 2 sentences do you think is true? Explain your answer.

A) At a certain frequency, the current is repeatably switching on/off causing the needle on the compass to move.

B) At a certain frequency, the current is repeatably doing something else that causes the needle on the compass to move.

A

Step-by-step explanation:

Not sure eh but yh I would say A because now of days current cuts on and off

c.35

step-by-step explanation:

8+13=21

21+8=29

29+6=35

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

eventually after a few more steps, your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x