A vessel leaves port and steams 11km north ,then 21km east and then 9km north a..howfar is it then from the port
b..what is the bearing of the port from this point
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step by step solution :

step   1   :

1.1     4 = 22

(4)3 = (22)3 = 26

equation at the end of step   1   :

  ((23) • 26)2

step   2   :

equation at the end of step   2   :

  (23 • 26)2

step   3   :

final result :

  218

ya

in total they made   333.74 your welcome : d

d is ur answer hopes this i dont really know how to explain it to u.