Geometry
posted by crystal .
A boat starts at point A, moves 3 km due north, then 2 km die east, then 1 km due south, and then 4 km die east to point B. Find the distance AB.

North 3  1 = 2
east 2 + 4 = 6
distance = sqrt (2^2 + 6^2) = sqrt(40) = 2 sqrt(10) 
47, cuz I said so