## Algebra and Trigonometry 10th Edition

Published by Cengage Learning

# Chapter 10 - 10.2 - Operations with Matrices - 10.2 Exercises - Page 726: 74

#### Answer

The maximum rates are: $\begin{bmatrix} 688.8 & 750.4 & 828.8 & 1108.8\\ 1114.4 & 1153.6 & 1321.6 & 1237.6\\ \end{bmatrix}$

#### Work Step by Step

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: $\begin{bmatrix} 688.8 & 750.4 & 828.8 & 1108.8\\ 1114.4 & 1153.6 & 1321.6 & 1237.6\\ \end{bmatrix}$

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