Becca paddles about from the south bank of a stream to the north bank. she paddles at a rate of 8 mph the stream is the following west had a rate of 6 mph which of the following diagrams best illustrates the actual path of the boat

The first one is correct.  It shows her paddling at 8mph north and the water moving 6mph west.  Importantly it also has the vectors added correctly.  You draw all the vectors head to tail then the resultant vector is drawn from the base of the first one to the head of the last one with the arrow pointing in that direction.

The answer is as follows in the photo

Answer mechanical energy;