Answer: -0.25 in, per day.
Step-by-step explanation:
Given : The water level in a swimming pool decreases from 60 in to 58.25 in in one week.
Here Initial water level = 60 in
Final water level = 58.25 in
And one week = 7 days
We assume that the water level changes at a constant rate.
Then the rate of change in water level will be given by :-
[tex]\text{Rate of change}=\dfrac{\text{Final position-Initial position}}{\text{Time}}[/tex]
[tex]\text{Rate of change}=\dfrac{58.25\ in - 60\ in}{\text{7}}\\\\\Rightarrow\ \text{Rate of change}=\dfrac{-1.75}{7}=-0.25\ in/day[/tex]
Hence, the water level decrease each day = -0.25 in, per day.
