in 1995 life expectancy was 66.7 yrs, in 2002 it was 70. yrs. E represent the life expectancy and t represents the number of years since 1995(t)= _t + _
E(11)=
To find the life expectancy in 2011, we need to use the given information about the life expectancy in 1995 and 2002 and the equation E(t) = _t + _.
First, let's determine the values of _t and _. We know that in 1995, the life expectancy was 66.7 years. From the equation, we can substitute t = 0 and E(t) = 66.7 to find the value of _.
66.7 = 0 + _
Therefore, _ = 66.7.
Next, we need to find the value of _. We know that in 2002, the life expectancy was 70 years. From the equation, we can substitute t = 7 (since it's 7 years after 1995) and E(t) = 70 to find the value of _.
70 = 7 + _
Therefore, _ = 70 - 7 = 63.
Now we have the values of _t and _: _t = 66.7 and _ = 63.
To find E(11), we substitute t = 11 into the equation:
E(11) = 66.7 + 63 = 129.7 years.
Therefore, the life expectancy in 2011 (11 years after 1995) is 129.7 years.