Question

How fast does the earth revolve around the sun in mph?

Answer 1

Easier to wtite in miles per second:
18.50 mi/s.

Explanation:

The average distance from the Sun to Earth is 92.96 million miles. Since the orbit is nearly circular you can multiply by `2\pi` to get the ciecumference. Divide that by 365.24 solar days per year and then by 86,400 seconds per solar day and you get 18.50 miles per second.