## Algebra and Trigonometry 10th Edition

The maximum rates are: $\begin{bmatrix} 688.8 & 750.4 & 828.8 & 1108.8\\ 1114.4 & 1153.6 & 1321.6 & 1237.6\\ \end{bmatrix}$
Multiply the matrix by a scalar of 1.12 to represent the 12% increase: $\begin{bmatrix} 615(1.12) & 670(1.12) & 740(1.12) & 990(1.12)\\ 995(1.12) & 1030(1.12) & 1180(1.12) & 1105(1.12)\\ \end{bmatrix}$ = $\begin{bmatrix} 688.8 & 750.4 & 828.8 & 1108.8\\ 1114.4 & 1153.6 & 1321.6 & 1237.6\\ \end{bmatrix}$ Therefore, the maximum rates are: $\begin{bmatrix} 688.8 & 750.4 & 828.8 & 1108.8\\ 1114.4 & 1153.6 & 1321.6 & 1237.6\\ \end{bmatrix}$