The average distance from the earth to the sun on the model is 12 inches, and the scale of the model is 1 inch representing 7,750,000 miles, so the average distance from the earth to the sun in miles is 12 * 7,750,000 = 93,000,000 miles. This is the average distance between the earth and the sun, also known as the astronomical unit (AU), which is a unit of length used in astronomy to measure distances within the solar system. The actual average distance from the earth to the sun is slightly different and is currently estimated to be about 93,000,000 miles.