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bixtya [17]
3 years ago
14

PLEASE HELP!!

Mathematics
2 answers:
nalin [4]3 years ago
6 0

Answer:

132,000

Step-by-step explanation:

so lets start with the yearly increase

we find this by doing 20,000*.28

which equals 5,600

next we need 20 years so we multiply by 20

5,600*20=112,000

don't forget we have to add the original population though

112,000+20,000=132,000

Scilla [17]3 years ago
6 0

Answer: the population after 20 years would be 2787593

Step-by-step explanation:

Their population increases by 28%

each year. This is an exponential growth. The formula for determining exponential growth is expressed as

A = P(1 + r/n)^nt

Where

P represents the initial population.

r represents the rate at which the population is growing.

n represents the number of period that the population is increasing.

A represents the total population after t years.

From the information given,

r = 28% = 28/100 = 0.28

t = 20 years

P = 20000

Therefore,

A = 20000(1 + 0.28/1)^1 × 20

A = 20000(1.28)^20

A = 2787593

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Answer:

Step-by-step explanation:

CH3Cl is polar while CCl4 is non polar.

When we consider whether something is polar or not we have to consider the following:

-Molecular symmetry

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-Whether or not all the bonds are equal in magnitude

So for CCl4:

-All of the bonds are equal, in that all the electronegativity differences (delta EN) are the same.

-There are polar bonds as the delta EN between Cl (EN = 3.0) and C (EN=2.5) is 0.5 which means the bond is polar covalent

But when we look at the symmetry of the molecule (by drawing the lewis structure) there are no lone pairs, meaning that the molecule is symmetrical and therefore, it is non polar.

For CH3Cl:

-There are polar bonds here whether between C-H or C-Cl like above, both delta EN are greater than or equal to 0.5

-But, all of the bonds are not equal in strength. Cl (3.0) atoms have much higher electronegativity values than H (2.1) and there for they will "pull" the electrons closer and polarize the molecule. Therefore, the differences in bonds causes this molecule to be asymmetrical, and hence polar.

4 0
3 years ago
An angle measures 80° more than the measure of a complementary angle. What is the measure of each angle?
Rom4ik [11]

Supplementary angles sum to 180 degree  

Let one angle be x  

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4 years ago
1/2(x-6.5) = 3.16 what is x?
cricket20 [7]

Answer:

x =12.82

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Will give brainlst!!
valentinak56 [21]

Answer:

2.5, 21/8, ³√25, π, √19

Step-by-step explanation:

The following data were obtained from the question:

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Next, we shall express each data as a decimal number where necessary. This can be obtained as follow:

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