Which number is greater? -45 or -12
The larger number is -12. When considering negative numbers, the closer the number is to 0, the greater that number is considered.
How old is the planet earth?
Earth is approximately 4.5 billion years old.
How many chambers does the human heart have?
The human heart has a total of 4 chambers. They are the right atrium, right ventricle, left atrium, and left ventricle.