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1. The length of the baby’s head is 5.5 inches if the ratio of a baby’s head length to the length of the rest of the body is 1:3.

   What is the ratio?

   It is described as the comparison of two quantities to determine how many times one obtains the other. The proportion can be expressed as a fraction or as a sign: between two integers.

   It is given that:

   At birth, the ratio of a baby’s head length to the length of the rest of the body is 1:3.

   A baby’s total body length is 22 inches,

   Let x be the head length

   Let 3x be the

   x + 3x = 22

   4x = 22

   x = 22/4 = 11/2 = 5.5 inches

   Thus, the length of the baby’s head is 5.5 inches if the ratio of a baby’s head length to the length of the rest of the body is 1:3.

   Learn more about the ratio here:

   brainly.com/question/13419413

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