Assume that the moon is a sphere. What is the volume of the moon if its diameter is 3,476 km? Express your answer in scientific notation to two significant digits.
A) 2.2 x 10^10 km^3
B) 2.2 x 10^9 km^3
C) 3.2 x 10^11 km^3
D) 1.8 x 10^10 km^3
+252 
