Solve the Problem $\quad\text { Cost/text } \text { Cost/min }$

question 148

Multiple Choice

Solve the problem.
-A student researches the cost for three cell phone plans. Matrix C contains the cost per text message and the cost per minute over the maximum number of minutes allowed in each plan. Matrix N
Represents the number of text messages and number of minutes over the maximum for 3 months. $\quad\text { Cost/text } \text { Cost/min }$
$C=\left[\begin{array}{cc|l}\$ 0.20 & \$ 0.35 & \text { Plan A } \\\$ 0 & \$ 0.35 & \text { Plan B } \\\$ 0.15 & \$ 0 & \text { Plan C }\end{array}\right.$

Month 1 Month 2 Month 3
$$N = \left[ \begin{array} { r r r } 27 & 60 & 25 \\105 & 27 & 0\end{array} \right] \begin{array} { l } \text { Number of texts } \\\text { Minutes over }\end{array}$$

Find the product $C N$ and interpret its meaning.

• A) \(\left[ \begin{array} { r r r } \$ 42.15 & \$ 21.45 & \$ 5.00 \\ \$ 36.75 & \$ 9.45 & \$ 0.00 \\ \$ 4.05 & \$ 9.00 & \$ 3.75 \end{array} \right]\) The matrix CN represents the additional cost per month for each plan. For example column 1
• Represents the cost for Plan A for months 1, 2, and 3, respectively.
• B) \(\text { } \left[ \begin{array} { r r r }
• \$ 42.15 & \$ 36.75 & \$ 4.05 \\
• \$ 21.45 & \$ 9.45 & \$ 9.00 \\
• \$ 5.00 & \$ 0.00 & \$ 3.75
• \end{array} \right]\)
• The matrix CN represents the additional cost per month for each plan. For example column 1 Represents the cost for Plan A for months 1, 2, and 3, respectively.
• C)\(\text { } \left[ \begin{array} { r r r }
• \$ 42.15 & \$ 36.75 & \$ 4.05 \\
• \$ 21.45 & \$ 9.45 & \$ 9.00 \\
• \$ 5.00 & \$ 0.00 & \$ 3.75
• \end{array} \right]\)
• The matrix CN represents the additional cost per month for each plan. For example row 1 Represents the cost for Plan A for months 1, 2, and 3, respectively.
• D)\(\text { } \left[ \begin{array} { r r r }
• \$ 42.15 & \$ 21.45 & \$ 5.00 \\
• \$ 36.75 & \$ 9.45 & \$ 0.00 \\
• \$ 4.05 & \$ 9.00 & \$ 3.75
• \end{array} \right]\)
• The matrix CN represents the additional cost per month for each plan. For example row 1Represents the cost for Plan A for months 1, 2, and 3, respectively.

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Definitions:

Actual Duty

The real or concrete responsibility that an individual has in a given situation, as opposed to potential or theoretical obligations.

Costs

The expenses or losses incurred in the pursuit of an activity or the production of goods or services.

Benefits

The positive outcomes, advantages, or gains received from a particular action or policy.

Impaired Infant

Refers to a newborn or young child who has significant physical, intellectual, or developmental abnormalities.