Respuesta :

irspow

Answer:

Step-by-step explanation:

[tex](x-h)^2+(y-k)^2=r^2\\ \\ (x-10)^2+(y-9)^2=r^2\\ \\ (4-10)^2+(7-9)^2=r^2\\ \\ 36+4=r^2\\ \\ r^2=40[/tex]