Maybe you can use the formula:
with is the radius of the circle and the period.
"The Earth revolves around the sun in an elliptical orbit, however for this problem you can assume that the orbit is circular with a radius of 9.3 * 10^7 miles.
In what speed in feet per second does Earth travel around the sun?"
I know this problem has something to do with angular velocity, but I'm confused as to how to start solving the problem.
2. You are asked to find the duration of one year. There are a lot of different "years" in astronomy. I would take the tropical year. According to Wikipedia (have alook here: Year - Wikipedia, the free encyclopedia)
"The mean tropical year is approximately 365 days, 5 hours, 48 minutes, 45 seconds"
Convert this time into seconds (I've got 31,556,925 s)
3. Calculate the speed (I've got )