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potternatalie90
22.05.2020 •
Mathematics
Two models of the same compound are shown.

In what way is Model A better than Model B?
Model A shows the types of elements in the compound, but Model B does not.
Model A shows the total number of atoms in the molecule, but Model B does not.
Model A shows the three-dimensional shape of the molecule, but Model B does not.
Model A shows the number of atoms of each element in the molecule, but Model B does not.
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Ответ:
Step-by-step explanation:
Model B shows how the atoms in the molecule are connected, but Model A does not.
Ответ:
The world population in 2030 will be of 9.0062 billion.
The would population in 2060 will be of 13.71 billion.
Step-by-step explanation:
The exponential model for population growth is as follows.
In which P(t) is the population in t years from now, P(0) is the population in the current year and r(decimal) is the growth rate.e = 2.71 is the Euler number.
If the world population is 7.0 billion in 2012.
2012 is the initial year, so P(0) = 7.
P(t) will be measured in billions of people.
The growth rate is constant at 1.4%.
This means that![r = 0.014](/tpl/images/0473/4424/ac4ce.png)
Calculate the population in 2030.
2030 is 2030-2012 = 18 years after 2012, so this is P(18).
So the world population in 2030 will be of 9.0062 billion.
What will be the population in 2060.
This is 2060-2012 = 48 years after 2012. So this is P(48).
The would population in 2060 will be of 13.71 billion.