# What is the size of the Earth's surface?

Use the formula for the surface area of a sphere to get an approximate value of

Thus, the Earth's surface area is roughly:

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The total surface area of the Earth is approximately 510.1 million square kilometers.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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