Solve the Problem Find a Matrix That Gives the Total Cost for These

question 84

Multiple Choice

Solve the problem.
-The labor costs per hour for an electrician, plumber, and air-conditioning/heating expert are given in matrix L. The time required from each specialist for three new model homes is given in matrix

Cost/hr
$\begin{array} { l } L = \left[ \begin{array} { l } \$ 40 \\\$ 38 \\\$ 34\end{array} \right] \begin{array} { l } \text { Electrician } \\\text { Plumber } \\\text { AC/heating }\end{array} \\\\\text { Time(hr) } \\\text { Electrician Plumber AC/heating } \\T = \left[ \begin{array} { l l r l } 165 & 14 & 16 \\25 & 22 & 19 \\17 & 13 & 8\end{array} \right] \begin{array} { l } \text { Model 1 } \\\text { Model 2 } \\\text { Model 3 }\end{array} \\\end{array}$

Find a matrix that gives the total cost for these three services for each model.

• A) \(\left[ \begin{array} { l } \$ 8,128 \\ \$ 1,838 \\ \$ 1,634 \end{array} \right]\)
• B) \([ \$ 11,604 ]\)
• C) \(\left[ \begin{array} { l } \$ 7,676 \\ \$ 2,482 \\ \$ 1,446 \end{array} \right]\)
• D) \([ \$ 11,600 ]\)

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