math
posted by chris .
Two hikers started at the same location. One traveled 2 miles east and then 1 mile north. The other traveled 1 mile west and then 3 miles south. At the end of their hikes, how many miles apart are the two hikers?

consider the origin as their starting location, then the first one ends up at (2,1) and the second hiker at (1,3)
so, using the distance formula between 2 points :
D = √((2+1)^2 + (1+4)^2)
= √(9+25)
= √34 or appr 5.8 miles apart