In 1992, life expectancy of males in a certain country was 72.7 years. In 1999 it was 76.5 years. E represent the life expectancy in year 1 and t represent the number of years since 1992.
E(t)= [ ]+ [ ] round to nearest tenth
E(13)= [ ]round to neareast tenth
To find the life expectancy in year 1, we can use the given data from 1992 and 1999. Let's assign "E" as the life expectancy and "t" as the number of years since 1992.
We can find the change in life expectancy by subtracting the life expectancy in 1992 from the life expectancy in 1999:
Change in life expectancy = Life expectancy in 1999 - Life expectancy in 1992
Change in life expectancy = 76.5 - 72.7
Change in life expectancy = 3.8
Now, we can find the life expectancy in year 1 by subtracting the change in life expectancy (3.8) from the life expectancy in 1992:
Life expectancy in year 1 = Life expectancy in 1992 - Change in life expectancy
Life expectancy in year 1 = 72.7 - 3.8
Life expectancy in year 1 = 68.9
Therefore, the life expectancy in year 1 is 68.9 years.
Now let's find the life expectancy for t = 13 (which means 13 years after 1992).
We can use the formula:
E(t) = Life expectancy in year 1 + (Change in life expectancy * t)
E(13) = 68.9 + (3.8 * 13)
E(13) = 68.9 + 49.4
E(13) = 118.3
Therefore, the life expectancy in year 13 (13 years after 1992) is 118.3 years (rounded to the nearest tenth).