Answer:
15
Step-by-step explanation:
distance formula
[tex]\sqrt{((x2-x1)^2 + (y2-y1)^2)}[/tex]
[tex]\sqrt{(9-0)^2 + (-6-6)^2}[/tex]
[tex]\sqrt{81 + 144}[/tex]
[tex]\sqrt{225}[/tex]
