The Earth is 1.5 - 108 km from the Sun (on average). How fast is the Earth orbiting the Sun in kilometers per second (on average)? You can assume the orbit of the Earth is a circle and that the circumference of a circle is equal to C = 21rR where R is the radius of a circle (the distance between the center and the edge. Note that for our purposes, it is perfectly fine to assume 71' = 3 which allows for a pretty good approximation 0 = 6R . Your answer does not need to be put into scientific notation, but if you choose to do so it will be marked correct! (WMW