# Population growth

How many people will be on Earth from two people for 5,000 years if every couple always has four children (2 boys and two girls) at the age of 25-35, and every man will live 75 years?

### Correct answer:

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#### You need to know the following knowledge to solve this word math problem:

**algebra**- geometric progression
- infinite geometric series
- expression of a variable from the formula
**basic functions**- reason
- exponential function

#### Units of physical quantities:

#### Grade of the word problem:

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