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How can the hair growth rate be used to determine how long ago an individual dyed their hair?

Sagot :

ari8037
The length of the undyed portions can tell how long ago a hair sample was dyed.
creese7911

Answer:

Hair grows 1cm each month, so take how many centimeter's the dyed hair is from the root and however cm's that is equals how many months ago someone dyed their hair.

Explanation:

Example: the dye begins 6cm from the root.  1cm = 1 month so that means that it has been 6 months since the individual dyed their hair.

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