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Kalibasib runs 12.0 m east and then 28.0 m in a direction 30.0 degrees east of north. How

far is Kalibasib from the starting point?

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make a sketch, then use the cosine law:
x^2 = 12^2 + 26^2 - 2(12)(28)cos120°
= 144 + 676 - (-336)
= 1156
x = √1156 = 34

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