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Given u = 35i − 12j, what are the magnitude and direction of −3u? Round to the nearest whole number.

37; 109°
37; 289°
111; 161°
111; 341°

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sqdancefan

Answer:

  (c)  (111; 161°)

Step-by-step explanation:

The given vector (u) is a 4th-quadrant vector with a magnitude just over 35 units. A vector 3 times that length in the opposite direction (-3u) will be one with a magnitude close to 111 in the 2nd-quadrant.

  (111; 161°)

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