Respuesta :

Answer:

13

Step-by-step explanation:

The distance between two points is found by

d = sqrt((y2-y1)^2 + (x2-x1)^2)

  = sqrt(15-3)^2 + (9-4)^2)

  =sqrt(12^2+5^2)

 =sqrt(144+25)

 = sqrt(169)

 = 13