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Mathematics 7 Online
OpenStudy (anonymous):

HELP FOR METAL AND FAN If v = (2, -5), find the magnitude and direction angle of 2v. Choice 'A' |2v| ≈ 8.8; θ ≈ 68° Choice 'B' |2v| ≈ 10.8; θ ≈ -48° Choice 'C' |2v| ≈ 18.8; θ ≈ -28° Choice 'D' |2v| ≈ 10.8; θ ≈ -68°

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