Question

Население МРС (малоразвитых стран с валовым национальным продуктом ВНП менее 670 дол. на душу населения) составляет 4.0 млрд человек. Процентный прирост населения составляет 2,1% в год. Вычислить время удвоения населения МРС, его ежемесячный и еженедельный прирост.

Answer 1

0,175 - ежемесячный прирост,
0,025 - эженедельный прирост,
Удвоение населения МРС примерно настанет через 47 лет.

Answer 2

Calculation of Population Growth Rate

To calculate the time it takes for the population of the Less Developed Countries (LDCs) to double, as well as the monthly and weekly population growth rates, we need to use the given information.

Given: - Population of LDCs: 4.0 billion people - Annual population growth rate: 2.1%

Time to Double the Population

The time it takes for a population to double can be calculated using the rule of 70, which states that the doubling time (in years) is approximately equal to 70 divided by the growth rate.

Using this formula, we can calculate the time it takes for the population of LDCs to double:

Doubling Time = 70 / Annual Growth Rate

Doubling Time = 70 / 2.1 = 33.33 years

Therefore, it would take approximately 33.33 years for the population of LDCs to double.

Monthly Population Growth Rate

To calculate the monthly population growth rate, we need to convert the annual growth rate to a monthly rate. We can use the following formula:

Monthly Growth Rate = (1 + Annual Growth Rate)^(1/12) - 1

Monthly Growth Rate = (1 + 0.021)^(1/12) - 1

Monthly Growth Rate ≈ 0.0017 or 0.17%

Therefore, the monthly population growth rate for LDCs is approximately 0.17%.

Weekly Population Growth Rate

To calculate the weekly population growth rate, we need to convert the annual growth rate to a weekly rate. We can use the following formula:

Weekly Growth Rate = (1 + Annual Growth Rate)^(1/52) - 1

Weekly Growth Rate = (1 + 0.021)^(1/52) - 1

Weekly Growth Rate ≈ 0.0004 or 0.04%

Therefore, the weekly population growth rate for LDCs is approximately 0.04%.

Please note that the above calculations are based on the given information and assumptions.