Question

A country's population was 12 million in 1992 and in 2012 it is 24 million. If the population grew at a constant rate, that percent rate of growth was ____

A)7 %
B)2.5 %
C)4 %
D)3.5 %

Answer 1

The percent rate of growth for the country's population was 100%.

Step-by-step explanation:

To find the percent rate of growth, we need to calculate the annual growth rate from 1992 to 2012.

Step 1: Subtract the initial population from the final population: 24 million - 12 million = 12 million.

Step 2: Calculate the rate of growth by dividing the difference by the initial population and multiplying by 100 to get a percentage: (12 million / 12 million) x 100 = 100%.

So, the percent rate of growth for the country's population was 100%.

Answer 2

None of the provided answer choices match the correct percentage. However, the correct answer is 5%.

To find the percent rate of growth, we need to calculate the average annual growth rate over the 20-year period from 1992 to 2012.

First, let's determine the total growth in population: 24 million - 12 million = 12 million.

Next, let's find the average annual growth rate:

Total growth / Number of years = 12 million / 20 years = 0.6 million per year.

To express this as a percentage, we need to calculate the percentage of the initial population that represents the average annual growth:

(0.6 million / 12 million) × 100 = 5%.

Therefore, the percent rate of growth for the country's population was 5% over the 20-year period.