Find the Distance Between the Pair of Points $x ^ { 2 } + y ^ { 2 }$

Short Answer

Find the distance between the pair of points. Give an exact answer, and where appropriate, an approximation to three decimal places.
-(0, 0) and (x, y)
A) $x ^ { 2 } + y ^ { 2 }$
B) $\sqrt { x ^ { 2 } + y ^ { 2 } }$
C) $\sqrt { x + y }$
D) x+y