Answer:
When the solar system settled into its current layout about 4.5 billion years ago, Earth formed when gravity pulled swirling gas and dust in to become the third planet from the Sun. Like its fellow terrestrial planets, Earth has a central core, a rocky mantle and a solid crust.
Using the significant figure it would be 27.3
A. Cuz it contains more salt
Hope this helps good luck on ur examsss :))))
