Answer:
The total mass of the babies was 7.41 kilograms.
Step-by-step explanation:
Consider the provided information.
When they were first born, Adrian massed 2.87 kilograms and Chang massed was 4.54 kilograms.
Now we need to find How much did the babies mass in total.
For this we just need to add the numbers as shown:
2.87
+<u>4.54</u>
<u> 7.41</u>
Hence, the total mass of the babies was 7.41 kilograms.