Answer:
18.08 million people increase per year
Step-by-step explanation:
870.5 to 960.9 difference in 5 years.
960.9- 870.5 divided by 5 is your formula
comes to a 18.08 million people increase per year
Here are some solutions in solving the problems about India's population:
a. Growth Factor in One Year:
The equation tells us that the population increases by a factor of `1.021` each year. This represents a 102.1% increase.
b. Equation for Decades:
To express the equation in terms of decades `d` since 1990, we need to adjust the exponent:
- One year is 0.1 decades.
- Therefore, `t = 0.1d`.
Substitute this into the original equation:
```
p = 870.5 * (1.021)^(0.1d)
```
c. Predicted Population in 2015:
2015 is 25 years (or 2.5 decades) after 1990. Substitute `d = 2.5` into the modified equation:
```
p = 870.5 * (1.021)^(0.1 * 2.5) ≈ 1252.4 million
```
d. Comparison with Actual Population:
The predicted population in 2015 is 1252.4 million, while the actual population was **1311 million**. This means the model **underestimates** the actual population by about **58.6 million**.
Possible reasons for the underestimation:**
* The model assumes a constant growth rate, which may need to be more accurate. Factors like changes in birth and death rates, migration patterns, and economic factors can complexly influence population growth.
* The model is based on data from 1990 and 1995; population trends might have changed over time.
Therefore, while the model provides a general estimate, it's essential to acknowledge its limitations and potential inaccuracies.
The graph below will show how India's population growth is projected and actual.
