Answer:
its the last one
Step-by-step explanation:
1st question is
A. 4C0m430 + 4C1m331 + 4C2m232 + 4C3m133 + 4C4m034
2nd question is
C. x4 + 12x3 + 54x2 + 108x + 81
Hope this helps u out :)
It will take 3 men 20 days to complete the job.
5 is the answer
hope this helps