http://www.lew-port.com/10712041113395710/lib/10712041113395710%5C_CalAttachments%5Ccircles%209.pdf Number 12. How do you find the answer?

http://www.lew-port.com/10712041113395710/lib/10712041113395710%5C_CalAttachments%5Ccircles%209.pdf Number 12. How do you find the answer?

http://www.lew-port.com/10712041113395710/lib/10712041113395710%5C_CalAttachments%5Ccircles%209.pdf Number 12. How do you find the answer?