I'm stuck on this math problem for my physics class, I'm sure it's not that difficult, but it confuses me: The Average distance between the Earth and the sun is 1.50 X 10^8 km. a. Calculate the average speed in km/h of earth assuming a circular path about the sun. Use the equation v= 2TTr/T. b. Convert your answer from km/h to m/s. Show all units.