Calculate the total number of years that each of the geologic eras lasted, rounding to the nearest 100 million. Then, calculate each of these values as a percentage of the total 4.6 billion years of Earth's history. Round your answer to the units place.

Eoarchean Era - 400 million years - 8,7% of Earth's history.

Paleoarchean Era - 400 million years - 8,7% of Earth's history.

Mesoarchean Era - 400 million years - 8,7% of Earth's history.

Neoarchean Era - 300 million years - 6,5% of Earth's history.

Paleoproterozoic Era - 900 million years - 19,6% of Earth's history.

Mesoproterozoic Era - 600 million years - 13,0% of Earth's history.

Neoproterozoic Era - 459 million years - 10,0% of Earth's history.

Paleozoic Era - 290 million years - 6,3% of Earth's history.

Mesozoic Era - 185 million years - 4,0% of Earth's history.

Cenozoic Era - 66 million years - 1,4% of Earth history.

what was the significance of the plessy vs ferguson ruling and jim crow laws

answer the impact. plessy v. ferguson allowed 'separate but equal, also known as segregation, to become law in the united states