Answer: c
Step-by-step explanation:
I think, not 100% sure, but I think it is square root (A/4pi)=r
13 units from 20 could either be 33 or 7; 15 units from -8 could either be 7 or 23.Since 7 satisfy both of the above requirements, Sarah's favorite number is 7. (You could show your work using a number line)
The two possibilities of Neil's favorite number are 26 and -12.
This is because minus times minus is equals plus so the sign must change
