Answer:
70/9
Step-by-step explanation:
9x-81= -11
9x=-11+81
9x= 70
x= 70/9
2π feet
9:30 PM to 1:30 AM is 4 hours.
It is 1/3 of a complete revolution.
A full 12 hours would be 2×r×π=2×3×π
1/3 of that is:
1/3×2×3×π=2π
≈6.283185307 feet