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26-08-2016
Mathematics

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What medullary index indicates a human hair?

A. 0.256
B. 0.516
C. 0.653
D. 0.733

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taskmasters taskmasters

31-08-2016

The medullary index of human hair is less than 1/3. 1/3 in decimal form is 0.3333.

Among the choices, only A. 0.256 is less than 1/3. Thus, it is the medullary index the indicates a human hair.

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