With the data for selected years from 1920 to 2007, the life span of individuals in a country can be modeled by where x = 0 represents 1900. Find the predicted average life span from 2040 to 2055. Round your answer to the nearest year.
A) 120 years
B) 137 years
C) 84 years
D) 270 years
E) 47 years

Question

With the data for selected years from 1920 to 2007, the life span of individuals in a country can be modeled by  where x = 0 represents 1900. Find the predicted average life span from 2040 to 2055. Round your answer to the nearest year. ​
A) 120 years 
B) 137 years 
C) 84 years 
D) 270 years 
E) 47 years

Quizplus · Accepted Answer

To find the predicted average life span from 2040 to 2055, we need to evaluate the function for x=120 (representing the year 2040) to x=135 (representing the year 2055).

11ea984b_b14c_7bcb_9029_d1ed96c5e407_TB4005_11(120) = 95
11ea984b_b14c_7bcb_9029_d1ed96c5e407_TB4005_11(135) = 97

The average of these values is (95+97)/2 = 96. This means that the predicted average life span from 2040 to 2055 is 96 years, rounded to the nearest year. The closest option is C) 84 years.

With the Data for Selected Years from 1920 to 2007