1. The problem statement, all variables and given/known data If vector B is added to vector C = 3.7i + 2.4j, the result is a vector in the positive direction of the y axis, with a magnitude equal to that of vector C. What is the magnitude of vector B? 2. Relevant equations sqroot(a^2x+a^2y) = a 3. The attempt at a solution My line of reasoning: since the magnitude of vector B is equal to the magnitude of vector C, then finding the magnitude of vector C using the given components would yield the magnitude of vector B. How I went about solving the problem: I used 3.7i as the x component of C and 2.4j as the Y component, then plugged each component into the following formula: c = sqroot(c2x+c2y). I received an answer of 4.4 but it has been marked as incorrect. Please let me know why my reasoning is incorrect (I don't need the answer).