I'm assuming, from what you've given me that the question is asking to do this.
15n=647
647 divided by 15 equals 43.13...repeated
Let me know if this is what you are looking for.
I do A and B but that is the way I learned it. Hope this helps :)
Answer:

Step-by-step explanation:
655*655 is pretty much equal to 655²
the square root of a number to the power of 2 is equal to the number without the power
so √655² would be equal to 655
Answer: D) 4
Find 6 on the x-axis, then find the y-value for that x-coordinate. The y-value for the x-coordinate of 6 is 4.