Question

each year for 5 years the time it takes you to run a mile decreases by 8 seconds. find the total change in time

Answer 1

-40 seconds
simple as that

Answer 2

Total change in time is -40 seconds. It is represents by the integer -40 because negative sign represents the decrease in time.

Explanation:

It is given that each year for 5 years the time it takes you to run a mile decreases by 8 seconds.

Total number of year = 5

Change in each year = -8

Here negative sign represents the decrease in time.

Total change in time = Total number of year × Change in each year

`\text{Total change in time}=5* (-8)`

`\text{Total change in time}=-40`

Therefore, total change in time is -40 seconds. It means, we need 40 seconds less to run a mile.