How old is Earth approximately? 4.5 billion years old 4.5 million years old 4.5 trillion years old 4.5 quintillion years old

The correct answer is: 4.5 billion years old.According to scientific estimates, the Earth is approximately 4.5 billion years old. This age has been determined through various methods, including radiometric dating of rocks and minerals, as well as the study of the oldest known terrestrial rocks and meteorites. The other options provided (4.5 million years, 4.5 trillion years, and 4.5 quintillion years) are not accurate estimates of the Earth's age.