SOLUTION: At birth, the ratio of a baby’s head length to the length of the rest of its body is 1:3 if a baby length is 20 inches, how long is the baby’s head at birth?
As an adult, th
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-> SOLUTION: At birth, the ratio of a baby’s head length to the length of the rest of its body is 1:3 if a baby length is 20 inches, how long is the baby’s head at birth?
As an adult, th
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Question 1147845: At birth, the ratio of a baby’s head length to the length of the rest of its body is 1:3 if a baby length is 20 inches, how long is the baby’s head at birth?
As an adult, the person grows to a total length of 72 inches with a head length of 8 inches. Compare the ratios of the person as a baby to that adult. Explain how the ratio changed Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! The rest of the body is L
1:3 as x:20
Cross-multiply and 3x=20 and x=6 2/3 inches
the ratio of the head to the length of the WHOLE body (head and length) is 6 2/3 to 26 2/3 or 1:4
That compares to 1:9 in the adult. Encephalization (head growth) occurs faster than the rest of the body, so the head is much bigger than adult proportions in newborns, bigger in childhood, before finally reaching adulthood. Most of the head growth appears before and shortly after birth; the body requires a longer period of time.
