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Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee

Help meeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee-example-1

1 Answer

4 votes

Answer:

600

Explanation:


R(1)=400 \\ \\ R(2)=1000 \\ \\ R(2)-R(1)=600

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