Answer:
3 units
Step-by-step explanation:
Distance between two points (x1,y1) and (x2,y2) on coordinate plane is given by
distance = 
Given points in the problem are (3,-5) and
(3,-2).
Thus distance between points (3,-5) and
(3,-2).

Distance between points (3,-5) and
(3,-2) is 3 units