Generally, Humans grow at a slow rate until we get the our puberty. The growth rate also depends on nutrition and the genetic. Most of the surveys shows that infants grow in height during the first four years after birth is "3 inches per year."
13.1 an hour, 34 hours a week 13.1 x 34 = 445.4 a week to find out how many weeks, divide 4300 and 445.4 which is 9.65 weeks, which is technically 10 weeks