Trig
posted by MEGGG!!! .
Nathan and Julia are walking along lines that form a 38 degree angle. If Nathan walks at 3.6 miles per hour and Julia walks at 4.1 miles per hour, how far apart will they be after 2 hours?

Use law of cosines:
c^2=a^2 +b^2 2abcosC
C=38deg
a=3.6*2
b=4.1*2 
Thank you Bob, your awesome :D