In 1992 the life expectancy of males in a certain country was 61.6 years. In 1996, it was 65.5 years. Let E represent the life expectancy in years and let t represent the number of years

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drwls, that is the complete question

To find the change in life expectancy, we need to subtract the initial life expectancy from the final life expectancy.

The initial life expectancy in 1992 was 61.6 years, and the final life expectancy in 1996 was 65.5 years.

Change in life expectancy = Final life expectancy - Initial life expectancy
Change in life expectancy = 65.5 - 61.6

To calculate this, simply subtract 61.6 from 65.5:

65.5 - 61.6 = 3.9

Therefore, the change in life expectancy over those four years is 3.9 years.