One side of an equilateral triangle measures 6 cm. find the measure of an altitude of the length.

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If 90° < θ < 180° and cotθ = -1/3, then cscθ =

Aremote-controlled boat can travel at 4 feet per second in calm water. the boat traveled 48 feet with the current, and then it traveled 16 feet against the current in the same amount of time. how fast is the current?