a newborn infant usually tripples its birthday weight by its first birthday. baby carter weighed 28 pounds on his first birthday. if this were tripple his birth weight (b), which equation below could be used to determine his birth weight?

1)b/3=28
2)b-3=28
3)3b=28
4)b +3=28
5)3(b+3)=28

In other words if baby carter weight from birth is 3 times it when he i his first birthday

birth weight times 3 = how much he weighs his first birthday

To determine the birth weight (b) of baby Carter, we can use the information that a newborn infant usually triples its birth weight by its first birthday.

Let's set up an equation to represent this relationship:

3b = 28

The equation states that three times the birth weight (3b) is equal to 28 pounds on the first birthday.

Therefore, the correct equation to determine Carter's birth weight is option 3:

3b = 28