Answer:
5 units
Explanation:
Use the distance formula. d=sqrt((y2-y1)^2+(x2-x1)^2)
d is the distance, and (x1,y1) and (x2,y2) are your points.
Use (0,5) for (x1,y1) and (3,9) for (x2,y2).
d=sqrt((9-5)^2+(3-0)^2)
=sqrt(4^2 + 3^2)
=sqrt(16+9)
=sqrt(25)
=5
They are 5 units apart. Hope I could help you!