Question

the bar graph shows that life expectancy, the number of years newborns are expected to live, in a particular region has increased dramatically since ancient times. find the percent increase in average life expectancy of the region from the stone age to 2016. (round to the nearest integer as needed.) average life expectancy (years) 0 10 20 30 40 50 60 70 80 stone age 27 ancient greece 29 middle ages 30 1900 32 1950 50 1990 62 2016 72

Explanation:

Step1: Identify initial and final values

Initial value (Stone Age) $a = 27$, final value (2016) $b = 72$.

Step2: Use percent - increase formula

Percent increase formula is $\text{Percent Increase}=\frac{b - a}{a}\times100\%$. Substitute $a = 27$ and $b = 72$ into the formula: $\frac{72 - 27}{27}\times100\%=\frac{45}{27}\times100\%$.

Step3: Calculate the result

$\frac{45}{27}\times100\%=\frac{5}{3}\times100\%\approx167\%$.

Answer:

167%