Вопрос № 627027 - Английский язык

When examining the soil of the potato field the quantity of rain worms was calculated on test plots 100*100 centimeters in size. In 10 test plots there were found 120  rain worms. To combat potato beetle the field was pesticide-laden and then the rain-worm were recalculated in the same test plots. There were only 30 rain worms found. Calculate the population density of rain worms per  square meter before and after pesticide-laden; calculate by how many times the population density has become lower under the impact of pesticide. (Give your answers in the answer fields as whole numbers separated by a comma without any spaces.)

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The biggest danger with a worm is its capability to quickly replicate itself.

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People with little technical knowledge can’t attach USB devices to a system.

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To protect your computer you should download anti-virus updates regularly.

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It is more expensive to create a wired network than a wireless one.

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Computers are widely used in every day life of the modern society.