Which of these powers is considered an implied power? raising taxes regulating trade creating a national bank declaring war

The answer is "creating a national bank".

Implied powers, in the United States, are powers approved by the Constitution that, while not expressed, appear suggested by forces that are explicitly expressed. At the point when George Washington requested that Alexander Hamilton shield the defendability of the First Bank of the United States against the dissents.  

On account of the United States Government, implied powers will be powers Congress practices that the Constitution does not unequivocally characterize, but rather are vital and legitimate to execute the forces.  

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agriculture and oil. natural resources, industry.