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Anonymous users2024-01-24The questions are incomplete!
The profit is 70-40 = 30 yuan.
The profit margin is (70-40) 40=75%.
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Anonymous users2024-01-23Solution: Suppose to increase the planting area x mu total planting area: (2+x) unit price per mu:
2000*(1+5%*x) cost: (2+x)*1000(2+x)*2000*(1+5%*x)-(2+x)*1000=24000x +12x-220=0(x+22)*(x-10)=0x=10 (the other value-22 does not match the title, so it is rounded).
Do you know what designers live on?
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