If vector A = (-3.0, -4.0) and vector B = (+3.0, -8.0), whatis the magnitude of

Question

If vector A = (-3.0, -4.0) and vector B = (+3.0, -8.0), whatis the magnitude of vector C = A - B? I know the answer is 7.2 but I have no idea how to get theanswer. Could someone please explain? This problem isnot in the book by the way, it was given to us by the professor(this is from a college physics course, not calculus bassed) If vector A = (-3.0, -4.0) and vector B = (+3.0, -8.0), whatis the magnitude of vector C = A - B? I know the answer is 7.2 but I have no idea how to get theanswer. Could someone please explain? This problem isnot in the book by the way, it was given to us by the professor(this is from a college physics course, not calculus bassed)

Explanation / Answer

      vector C = A - B                      = (-3 i - 4 j) - (3 i -8 j)                      = -6 i + 4 j        magnitude of vectorC = ( -6 2 + 4 2 )                                            = 52                                            = 7.2

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