select the correct answer.\na group of scientists studied the invasion of a species in an area and its…

select the correct answer.\na group of scientists studied the invasion of a species in an area and its effect on the population of a native species. study the given data and determine the percent decrease in the native species population between years 1 and 2 and years 2 and 3.\n| |population of native species|\n|----|----|\n|year 1|7,950|\n|year 2|3,460|\n|year 3|1,380|\n\na. 49.6% and 55.3%\nb. 56.5% and 60.1%\nc. 52.5% and 63.3%\nd. 50.4% and 68.9%\ne. 54.3% and 67.6%

select the correct answer.\na group of scientists studied the invasion of a species in an area and its effect on the population of a native species. study the given data and determine the percent decrease in the native species population between years 1 and 2 and years 2 and 3.\n| |population of native species|\n|----|----|\n|year 1|7,950|\n|year 2|3,460|\n|year 3|1,380|\n\na. 49.6% and 55.3%\nb. 56.5% and 60.1%\nc. 52.5% and 63.3%\nd. 50.4% and 68.9%\ne. 54.3% and 67.6%

Answer

Explanation:

Step1: Calculate percent - decrease from year 1 to year 2

Percent decrease formula is $\frac{\text{Initial value}-\text{Final value}}{\text{Initial value}}\times100%$. Initial value in year 1 is 7950 and final value in year 2 is 3460. So, $\frac{7950 - 3460}{7950}\times100%=\frac{4490}{7950}\times100%\approx0.565\times100% = 56.5%$.

Step2: Calculate percent - decrease from year 2 to year 3

Initial value in year 2 is 3460 and final value in year 3 is 1380. So, $\frac{3460 - 1380}{3460}\times100%=\frac{2080}{3460}\times100%\approx0.601\times100% = 60.1%$.

Answer:

B. 56.5% and 60.1%