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John starts at the origin and walks 3.0 km due east. If he then walks 30? north of east for 8.0 km, what is his distance from the origin (in km)?
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A projectile is launched at an angle of 13.0° above the horizontal. What is its initial speed if it hits a target that is located a horizontal distance of 155 m from the launch point and 10.5 m below the launch level?
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