Find the distance between A and D. Simplify completely.

A is located at (1,3) D is located at (5,0)
distance formula is sqrt((x2-x1)^2 +(y2-y1)^2)
= sqrt(( 5-1)^2 + (0-3)^2)
= sqrt((4^2 +-3^2)
= sqrt (16+9)
= sqrt(25)
= 5
distance is 5 units