Hello, qleeq!

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.

Earth: .

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.