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An infant's birth weight typically doubles by the age of six months and triples within the first year. By the time a child reaches two years old, their weight will have quadrupled, which corresponds to an expected weight of 20 to 40 pounds.

Weight Development in Infancy and Early Childhood

A healthy infant is born weighing 7 pounds. Based on typical developmental patterns for weight gain, what is the most likely expected weight for this child on their first birthday?

Given the following scenario, calculate the child's expected weight on their first birthday and explain the principle you used to arrive at your answer.

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