Respuesta :

 [tex]\displaystyle d= \sqrt{(x_1-x_0)^2+(y_1-y_0)^2} [/tex] - d is distance, (x_1,y_1) and (x_0,y_0) two points on a coordinate grid.

In our case :
[tex](x_1,y_1)=(a,0)\\(x_0,y_0)=(0,5)[/tex]

[tex]d= \sqrt{(a-0)^2+(0-5)^2} = \sqrt{a^2+25} [/tex]

Answer:

Step-by-step explanation:

Answer is B