The distance is the distance in millions of miles from the sun,
and is the period in years it takes to revolve once around the sun.
Find the average orbital velocity of Earth.
Assuming that Earth's orbit is a circle, its radius is 92,900,000 miles.
The length of this orbit is: . miles.
The Earth travels that far in one year (365 days = 8760 hours).
Therefore, its average velocity is: . mph.