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Posted by **Mohammad** on Thursday, January 5, 2012 at 7:22pm.

1. calculate following increases or decreases in population for following countries.

Country A

Births/1000 = 90

Deaths = 36

Immigrants = 20

Emigrants = 10

I calculate this I get 64/1000

Country B

Births/1000 = 75

Deaths = 15

Immigrants = 10

Emigrants = 2

I calculate this I get 68/1000

Country C

Births/1000 = 25

Deaths = 18

Immigrants = 11

Emigrants = 10

I calculate this I get 8/1000

Country D

Births/1000 = 15

Deaths = 14

Immigrants = 8

Emigrants = 6

I calculate this I get 3/1000

2. calculate doubling time of each of following countries

Country E

Births = 110

Deaths = 50

Calculations I get : for natural growh rate/year i get 6%

doubling time i get 11.6 yrs

Country F

Births = 75

Deaths = 32

calculations I get: natural growth reate/yr i get 4.3%

doubling time i get 16.3yrs

Country G

births = 20

deaths = 13

calcualtions: i get .7% for natural growth rate and doubling time be 100 yrs

Country H

births = 90

deaths = 75

calculations: i get 1.5% for natural growth rate, and doubling time be 46.7 yrs.

3. calculate following dependency ratio for following countries

Country I

% children = 21

% adults over 65 = 12

calculations i get for % adults = 67 and dependency load = 33.

Country J

% children = 47

% adults over 65 = 7

calculations i get for % adults = 46

and dependency load = 54

Country K

% children = 19

% adults over 65 = 24

calculations i get for % adults = 57

and dependency load = 43.

Country M

% children = 43

% adults over 65 = 15

calculations i get for % adults = 42 and dependency load = 58

the question i not get is based on population statistics in every grouping countries E - H & I - M, which 2 countries be run into some serious development problem and population problem in future, explain hypothesis 4 each.

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**Mohammad**, Thursday, January 5, 2012 at 7:47pmms. sue i say before that country e run into problem because it have large fast growing population in small period so it will need to face development isse for schools, daycares i think. country m run into problems because more children dependent on parents but i need more thing to add in here to make paragraph big.

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**Ms. Sue**, Thursday, January 5, 2012 at 7:51pmI checked some of your math and it seems to be correct.

If a country is growing fast, it needs to be sure it has enough jobs, food and water for the people.

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**Mohammad**, Thursday, January 5, 2012 at 7:57pmyeah teacher checked math too and he said was correct but i just not get the last question bit part. for the first part the fast growing population count for children? because then they need more things? the country M :

Country M

% children = 43

% adults over 65 = 15

calculations i get for % adults = 42 and dependency load = 58

the dependency load too much, that mean so many children dependent on parents, but what problem that make?

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**Mohammad**, Thursday, January 5, 2012 at 8:22pmms. sue i right?

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**Ms. Sue**, Thursday, January 5, 2012 at 8:24pmThe problem is that many parents with a lot of children can't afford to feed and clothe and educate them.

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**Mohammad**, Thursday, January 5, 2012 at 8:25pmthank you very much ms. sue :) so they basically have no job and dont get good income right?

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**Ms. Sue**, Thursday, January 5, 2012 at 8:32pmRight.

Most countries with a high birthrate are very poor.

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**Shreya**, Thursday, January 5, 2012 at 8:34pmthank you very much ms. sue :)

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**Shreya**, Thursday, January 5, 2012 at 8:35pmsorry my brother went to go eat his dinner so i replying for him. i actually not have socials this year i have math and physics can you help with that?

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**Ms. Sue**, Thursday, January 5, 2012 at 8:37pmI can't help with physics and higher level math, but some of our tutors can.

Please post your questions by clicking__Post a New Question__.

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**Shreya**, Thursday, January 5, 2012 at 8:38pmalright thanks :)

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**Ms. Sue**, Thursday, January 5, 2012 at 8:49pmYou're welcome.

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