Answer:
18
Step-by-step explanation:
Since each table had 7 women and 3 men at each table, that would mean each table has 10 people. Since there are 9 tables he was waiting on, and 10 people at each table, multiply 9 x 10, and you will find that he served 90 people in total.
12x12=144. Answer is 144 miles
Using the formula:
V= 1/6 πd^3
V ≈ 1838.78