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almond37 [142]
3 years ago
12

During the last 800,000, climate reconstructions show that CO2 Never changed more than ________ ppm upward or downward in any sp

an of less than 1,000 years, though it has risen by this amount in the last 13 years.
Geography
1 answer:
gulaghasi [49]3 years ago
8 0
The answer is - 30.
In the last 800,000 years, in a span of 1,000 years it never happened that the CO2 go upwards or downwards for more than 30 ppm. It has always been a slow process in this period and as much as the jumps were big, that never surpassed this number. On the other hand we are witnessing that this has happened nowadays in just 13 years, and that is very concerning because such rapid changes of CO2 in the atmosphere brings rapid changes in the climate and it will be a global catastrophe if this trend continues. 
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Explanation:

The question is incomplete without the expression that would be used to find the constant necessary to make a perfect square trinomial.

I would show you how to find the constant necessary to make a perfect square trinomial using the expression below:

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First thing we do, is to square half the coefficient of x

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