Answer:
Approximately 3.605 units
Step-by-step explanation:
AB= B -A = [tex]\left[\begin{array}{ccc}5\\9\end{array}\right][/tex] - [tex]\left[\begin{array}{ccc}8\\0\end{array}\right][/tex] = [tex]\left[\begin{array}{ccc}-3\\9\end{array}\right][/tex]
|AB| = √x²+y² = √(-3)²+2² = √9+4 =√13 = 3.605 units