Please help me.(geometry work)

[Guest]

Need help please!
I think #29. (X-5)^+(y-1)^=10
#30 center =(-2,1) radius =4

I dont know #28 please help and please let me know if the other answers are correct.

[shyamjayakannan]

28) radius = 4. so area = [tex]\pi r^2=\boxed{16\pi}[/tex] and circumference = [tex]2\pi r=\boxed{8\pi}[/tex].
29) the radius of the circle is the distance between the center and the given point = [tex]\sqrt{8^2+5^2}=\sqrt{89}[/tex]. So the equation is [tex]\boxed{(x-5)^2+(y-1)^2=89}[/tex].
30) you are correct.