Google images, I'm guessing.
Answer:
2400 Joules
Explanation:
Work done = force × distance
work done= 600×4
Therefore, work done=2400joules
P.S: the SI unit for work done is JOULES
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<span>The birth rate decreased, while the death rate increased.</span>
1. observing
2. forming hypotheses
3. testing hypotheses
4. analyzing data
5. evaluating results
Hope it helped