Question

b. In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did the elephant population decline over this time period? (Show your work.) How does this compare to the change in range over this same time period?

Answer 1

The elephant population declined by approximately 50.77% from 1979 to 2007.

Step-by-step explanation:

To calculate the decline in the elephant population over the specified period, you take the difference between the initial population (1.3 million in 1979) and the final population (640,000 in 2007), then divide that number by the initial population. Multiply the result by 100 to get the percentage decline:

Population decline = ((1,300,000 - 640,000) / 1,300,000) * 100 = (660,000 / 1,300,000) * 100 ≈ 50.77%

The elephant population declined by approximately 50.77% over this time period.

To calculate the percentage decline in the elephant population from 1979 to 2007:

Subtract the final population (640,000) from the initial population (1,300,000) to get the population decline: 1,300,000 - 640,000 = 660,000.

Calculate the decline as a percentage of the initial population by dividing the population decline by the initial population and multiplying by 100: (660,000 / 1,300,000) * 100 = 50.77%.

Therefore, the elephant population declined by approximately 50.77% over this time period.

To compare this to the change in range over the same time period, you would need information on the elephant's range in 1979 and 2007. Without that information, it is not possible to make a direct comparison.

Answer 2

The initial amount, 1.3 million = 1,300,000 is the 100%.

now, 640,000 is a given percentage (lower than 100%) of that.

How we can find it?

suppose that 640,000 represents an x%.

Then we have that the quotient between the actual quantities and the percentages must be the same

(640,000/1,300,000) = x%/100%

x% = (640,000/1,300,000)*100% = 49.23%

Then the percentage declined is:

100% - 49.23% = 50.77%

The other question can not be answered with the given information.