Answer:
Step-by-step explanation:
6 workers-9 jobs in 3 days
In one day 6 workers can do 3 jobs
In one day 1 worker can do 0.5 job
4 workers can so 2 jobs in a day
So. They can do 10 jobs in 5 days
Answer:
-3 is the answer.
Step-by-step explanation:

To estimate this, round 53 to 50 and 12 to 10. 50 times 10 will be roughly what? 500. that is the estimated answer. the real answer is 636.
-519
-30
-5.8
5.68
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