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The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Abird on top of a 200 ft bridge tower sees a man standing on the lower part of the bridge (which is 50 ft above the ground). the angle of depression from the bird is 26 ̊. how far is the man from the base of the bridge tower? with explanation and pictures .