The expected weight for this child at the age of 4 months would be 13lb (5900g)
Step-by-step explanation:
There are some predictions that exists in the growth of the baby. The weight of boy babies tend to be more than baby girls. There will a loss of weight of five to ten percent initially in the first week of born babies. They will again gain their wight in the next coming two to three weeks.
The weight of the infants usually tend to be double of the weight that was during their birth in the month of 4 to 5. It will be triple when they turn one year. In the given example, the infant's weight is 6lb that is 2,912 g. It will be double for the baby following the normal growth at the 4th month. Hence, the weight would be around 13lb (5900g) at the 4th month.