(x- h)^2+(y- k)^2= r^2
In this form, ( h, k) is the center of the circle and r is its radius.
We are told that the center of the circle is ( 10, 7) and its radius is 3.5.
This information is enough to write the equation.
(x- 10)^2+(y- 7)^2= 3.5^2
⇕
(x-10)^2+(y-7)^2=12.25
