
a.
To find: The matrix for the given data.
a.

Answer to Problem 28PPS
The matrix for the given data is
Explanation of Solution
Given information:
The data is shown below.
City | Normal Snowfall | 2007 snowfall | ||||
Jan | Feb | Mar | Jan | Feb | Mar | |
Grand Rapids, Ml | 2 1.1 | 12.2 | 9.0 | 15.4 | 33.6 | 13.6 |
Boston, MA | 13.3 | 11 .3 | 8.3 | 1.0 | 4.6 | 10.2 |
Buffalo, NY | 26.1 | 17.8 | 12.4 | 15.5 | 33.5 | 5.4 |
Pittsburgh, PA | 12.3 | 8.5 | 7.9 | 11.3 | 14.0 | 9.3 |
Calculation:
The matrix is,
The matrix for snowfall in 2007 is,
b.
To find: The matrix after subtracting normal data from snowfall in 2007.
b.

Answer to Problem 28PPS
The matrix after subtracting normal data from snowfall in 2007is
Explanation of Solution
Given information:
The data is shown below.
City | Normal Snowfall | 2007 snowfall | ||||
Jan | Feb | Mar | Jan | Feb | Mar | |
Grand Rapids, Ml | 2 1.1 | 12.2 | 9.0 | 15.4 | 33.6 | 13.6 |
Boston, MA | 13.3 | 11 .3 | 8.3 | 1.0 | 4.6 | 10.2 |
Buffalo, NY | 26.1 | 17.8 | 12.4 | 15.5 | 33.5 | 5.4 |
Pittsburgh, PA | 12.3 | 8.5 | 7.9 | 11.3 | 14.0 | 9.3 |
Calculation:
The matrix after subtracting normal data from snowfall in 2007is,
c.
To explain: The meaning of negative and positive number in the difference matrix.
c.

Explanation of Solution
Given information:
The data is shown below.
City | Normal Snowfall | 2007 snowfall | ||||
Jan | Feb | Mar | Jan | Feb | Mar | |
Grand Rapids, Ml | 2 1.1 | 12.2 | 9.0 | 15.4 | 33.6 | 13.6 |
Boston, MA | 13.3 | 11 .3 | 8.3 | 1.0 | 4.6 | 10.2 |
Buffalo, NY | 26.1 | 17.8 | 12.4 | 15.5 | 33.5 | 5.4 |
Pittsburgh, PA | 12.3 | 8.5 | 7.9 | 11.3 | 14.0 | 9.3 |
Calculation:
The meaning of negative numbers is the city was below normal on snow fall for the month and the meaning of positive number is the city was above normal on snow fall for the month.
Chapter 4 Solutions
Algebra 2
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