Okay this may be the dumbest question but I don't get how to do it:
Jane travels 10km due south, then 7 km due west how far is Jane from her starting point?

Pythagorean Theorem:

C^2 = A^2 + B^2

Answer = Squareroot ( 7(squared) + 10(squared) = Squareroot (49 + 100) = Squareroot (149)

= 12.207 km