Answer:
24 inches.
Step-by-step explanation:
Given:
During a week the water level in a pond decreased by 4 in. Per day,
For two days, it decreased by half that amount = ![4\times\frac{1}{2}=2\ inches\ per\ day](https://tex.z-dn.net/?f=4%5Ctimes%5Cfrac%7B1%7D%7B2%7D%3D2%5C%20inches%5C%20per%5C%20day)
Question asked:
How much did the water level decrease in the pond in one week?
Solution:
As we know, there are 7 days in a week.
<u>For 5 days,</u>
Each day water level decreased by = 4 inches
In 5 days, water level decreased by = ![4\times5=20\ inches](https://tex.z-dn.net/?f=4%5Ctimes5%3D20%5C%20inches)
<u>For exceptional 2 days:</u>
Each day water level decreased by = 2 inches
In 2 days, water level decreased by = ![2\times2=4\ inches](https://tex.z-dn.net/?f=2%5Ctimes2%3D4%5C%20inches)
Water level decreased in whole week = 20 + 4 = 24 inches
Therefore, water level decreased 24 inches in the pond in one week.