Concept explainers
To find the water level of Lake Superior in 1997.
Answer to Problem 11E
In 1997, the water level was
Explanation of Solution
Given information :
The table shows the year-to-year changes in the mean January water level of Lake Superior during the period 1997-2001 is given below:
Time period | 1997-1998 | 1998-1999 | 1999-2000 | 2000-2001 |
Change (meters) |
To find the overall change in the water level from 1997-2001, add the changes of water level,
The overall change in the water level from 1997-2001 is obtained as:
Now, let,
So, the level of water in 2001 is obtained as:
But, in 2001, the water level was 182.98 meters.
Therefore, the equation for calculating water level in 2001 is obtained as:
Now, solve for
Hence,
In 1997, the water level was
Chapter 2 Solutions
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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