Physics help?

Two boats leave the port at the same time. Boat A has a velocity of (4î - 3ĵ)m/s and boat B has a velocity of (3î + 4ĵ) m/s as measured by someone standing at the port (formula3.mml and formula4.mml are unit vectors along the x-axis and the y-axis respectively). What is the position vector of boat A as seen by a... show more Two boats leave the port at the same time. Boat A has a velocity of (4î - 3ĵ)m/s and boat B has a velocity of (3î + 4ĵ) m/s as measured by someone standing at the port (formula3.mml and formula4.mml are unit vectors along the x-axis and the y-axis respectively). What is the position vector of boat A as seen by a person traveling on boat B after 100 seconds has elapsed? Give your answer as magnitude and direction.
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