Human hairs have diameters between 17 and 180 mum for a, Ask an Expert

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Human hairs have diameters between 17 and 180 μm. For a hair that has a 72.0 μm diameter, how many can fit between a pair of teeth on a comb that are 0.150 inches apart ? Assume the ideal case where the hairs line up exactly side by side with no overlap. Give an integer as an answer, do not include a fraction of a hair.

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