sophiamorenop27 sophiamorenop27 01-06-2021 Mathematics contestada The average distance between the planet Neptune and the sun is about 4 x 10^9 kilometers. What is 4 x 10^9 written in standard notation? A. 0.0000000004 B. 0.000000004 C. 400,000,000 D. 4,000,000,000