Question

Based on the table, what is the total amount that the lake level changed over thegiven 6 month period?

Answer 1

The table shows increases (+) and decreases (-) in the lake level for the given period. By doing a cummulative addition, it would be easy to tell what the level was eventually.

We shall take the initial level of water to be x feet. The cummulative addition is now shown below;

Initial level + changes in subsequent levels

`\begin{gathered} \text{Changes}=x+0.5-1.26+0.32+3.71-1.27-1.0 \\ \text{Changes}=x \\ \text{Changes}=x+1 \end{gathered}`