Respuesta :
The Answer Is "exactly .3 kg
This is because during a physical change, like being broken into parts, mass is conserved. The glass cup had a mass of 0.3 kg before it was broken, so if Regan collected all of the broken pieces, they would have a combined mass of exactly 0.3 kg.
Answer:
The answer on Study Island is...
EXACTLY 0.3 kg.
Explanation:
I got it right on Study Island :)
I hope my answer can help other people who need it. God bless you all!