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Answer (d) valerie rides her bike south at 8 kilometers per hour///owen jogs south at 8 kilometers per hour ;
see the picture for the vector
the magnitude of the vector by pythagorean theorem
r = √( (-10)^2 + (3)^2 ) = √109
magnitude = √109 units
the direction angle between vector and x-axis is
tan^(-1)(3/10) = 16.699
so the direction is approximately 16.7 degrees north of west
induced emf value is missing..
please correct the question