Answer:
A.
Step-by-step explanation:
6 months back from September is March, and 2 years back would be 1969. And if today's date was september 6, 6 months back to be exact would be March 3, 1969
volume of a sphere is 4/3 * PI * r^3
r = 6
r^3 = 6^3 = 216
4/3 * 216 = 288
Volume = 288 PI in^3
mean would go down median would stay about the same
