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A ship sails 100mi northeast, then 50mi due south. How far is it from the starting point?

  • science -

    break the first leg into a N,and an E part.

    Npart=100*.707=70.7mi
    Epart=100*.707=70.7 mi

    now go 50 mi S

    resultant:
    Npart=20.7N
    Epart=70.7E

    distance=sqrt(Npart^2 + Epart^2)

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