Answer:
about 6.40 units
Explanation:
The distance formula is ...
d = √((x2 -x1)^2 +(y2 -y1)^2)
For the given points, the distance between them is ...
d = √((9 -13)^2 +(-4-1)^2) = √((-4)^2 +(-5)^2) = √(16 +25)
d = √41 ≈ 6.40
The distance between the points is about 6.40 units.