Find a Matrix a and a Column Matrix B That $$A B = \left[ \begin{array} { l } 840 \\650 \\870\end{array} \right]$$

question 155

Multiple Choice

Find a matrix A and a column matrix B that describe the following tables involving credits and tuition costs. Find the
matrix product AB, and interpret the significance of the entries of this product.
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• A) \[A B = \left[ \begin{array} { l } 840 \\ 650 \\ 870 \end{array} \right]\] Tuition for Student 1 is \(\$ 840\), tuition for Student 2 is \(\$ 650\), and tuition for Student 3 is \(\$ 870\).
• B) \[\mathrm { AB } = \left[ \begin{array} { l } 17 \\ 15 \\ 12 \end{array} \right]\] The number of credits for Student 1 is 12, the number of credits for Student 2 is 15, and the number of credi Student 3 is \(12 .\)
• C) \[\mathrm { AB } = \left[ \begin{array} { l } 940 \\ 800 \\ 620 \end{array} \right]\] Tuition for Student 1 is \(\$ 940\), tuition for Student 2 is \(\$ 800\), and tuition for Student 3 is \(\$ 620\).
• D) \[A B = \left[ \begin{array} { l } 12 \\ 17 \\ 15 \end{array} \right]\] The number of credits for Student 1 is 12 , the number of credits for Student 2 is 17 , and the number of credi Student 3 is \(15 .\)

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