What is the distance between M (2, - 7) and N (10, 9) ?

68

148

160

320

M (2, - 7) and N (10, 9)

distance MN as vector:

(10-2,9 - (-7)) = (8,16)

distance=√ (8²+16²) = √ (320) = 17.9

so the distance is 17.9 and you are probably supposed to answer with the squared distance=320, based on the answer options