Question

In 1995, the average life expectancy in the United States was 75.8 years. The average life expectancy in 2015 was 78.8 years. What is the percentage increase in life expectancy in the last 20 years? Choose the closest answer.



3.5%



4%



4.5%



5%

Answer 1

4% Because 78.8 divide 20= 3.94 then you would round it which makes 4% Hope that helps. 

Answer 2

Answer:

Option B, $4$ %

Explanation:

The average life expectancy in the United States in 1995 $= 75.8$ years

The average life expectancy in the United States in 2015 $= 78.8$ years

Change in average life expectancy in the United States from 1995 to 2015

$= 78.8 - 75.8\\= 3$ years

The percentage increase in life expectancy in the last 20 years is equal to change in life expectancy in last 20 years divided by average life expectancy in the base year

$= \frac{3}{75.8} * 100\\= 3.957$ %

≈$4$ %