What is the radius of the earth 4000 miles. The sun is approx. 109 times as wide. Find the sum radius?
radius is half of the diameter, we need the diameter. multiply the radius by 2
4000 * 2 = 8000
now multiply by 109
8000 * 109 = 872000 is the diameter of the sun
872000/2 = 436000 is the radius