$\"\"$

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The radius of Earths orbit is $\"\"$ .

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a.

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Find the circumference of Earths orbit assuming that the orbit is a circle.

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The formula for the circumference of a circle is $\"\"$ .

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$\"\"$ (Formula)

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Multiply)

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Therefore, the circumference of the earth is $\"\"$ .

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$\"\"$

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b.

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Earth travels at a speed of $\"\"$ around the Sun.

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The formula $\"\"$ , where $\"\"$ is time in hours, $\"\"$ is circumference and $\"\"$ is velocity.

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Find the number of hours it takes Earth to revolve around the Sun.

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$\"\"$ (Substitute $\"\"$ and $\"\"$ )

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$\"\"$ (Simplify)

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Therefore, the number of hours it takes Earth to revolve around the Sun is $\"\"$ .

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$\"\"$

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c.

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It takes $\"\"$ year for Earth to go around the Sun.

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$\"\"$ .

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Yes; $\"\"$ .

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$\"\"$

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a.The circumference of the earth is $\"\"$ .

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b.The number of hours it takes Earth to revolve around the Sun is $\"\"$ .

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c.Yes; $\"\"$ .