Magnitude of vectors

Vector $\vec u$u, with, vector, on top has an initial point $(3,3)$left parenthesis, 3, comma, 3, right parenthesis and a terminal point $(7,2)$left parenthesis, 7, comma, 2, right parenthesis.

Find the magnitude of $\vec u$u, with, vector, on top.
Enter an exact answer as an expression with a square root symbol or enter an approximate answer as a decimal rounded to the nearest hundredth.

$||\vec u|| =$vertical bar, vertical bar, u, with, vector, on top, vertical bar, vertical bar, equals