$\"\"$

The Earth is $\"\"$ kilometers from the Sun and Mercury is $\"\"$ kilometers fromthe Sun.

The difference in distances

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$\"\"$ (Write $\"\"$ as $\"\"$ )

$\"\"$ (Apply distributive property: $\"\"$ )

$\"\"$ (Subtract: $\"\"$ )

Write $\"\"$ scientific notation.

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The difference in distances is $\"\"$ .