Answer:
Explanation:
We can't multiply.
We got to count up by 12's for each 1/2 hour.
12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144, 156, 168.
Simplified:
- 24, 48, 72, 96, 120, 144, 168.
 
Estimate:
- 12 = 1/2 hour
 - 24 = 1 hour
 - 36 = 1 1/2 hours
 - 48 = 2 hours
 - 60 = 2 1/2 hours
 - 72 = 3 hours
 - 84 = 3 1/2 hours
 - 96 = 4 hours
 - 108 = 4 1/2 hours
 - 120 = 5 hours.
 - 132 = 5 1/2 hours
 - 144 = 6 hours
 - 156 = 6 1/2 hours
 - 168 = 7 hours.
 
Answer is 168.