A spelunker is surveying a cave. She follows a passage 120 m straight west, then 230 m in a direction 45∘ east of south, and then 280 m at 30∘ east of north. After a fourth unmeasured displacement, she finds herself back where she started. Determine the magnitude and direction of the fourth displacement.

Sorry i don’t know what to do

Answermake them get very hot and over time wear them out;

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Units, mass, direction.