The population of China is approximately 1.381 × 10 to the power of 9, and the population of the United States is approximately 3.23 × 10 to the power of 8.
About how many people live in both countries combined? Express your answer in scientific notation.
A. 4.611 × 10 to the power of 17
B. 1.704 × 10 to the power of 9
C. 4.46 × 10 to the power of 8
D. 1.849 × 10 to the power of 1
