Josie is flying in the air, starting at (2,-4,8) which units are in miles. It takes her one hour to travel to (3,-2,11). For what values of x and y that would the new path perpendicular to the original path of the new point is (10,x,y). Josie travels in the right direction.

I am having trouble with this problem. can someone explain it to me? I'd like some steps.