# Chapter 9 - Section 9.3 - Area, Volume, and Surface Area - Exercise Set - Page 636: 45

For four panels $4\times42=168$ square ft of material is needed

#### Work Step by Step

The area of a rectangle can be calculated as: $A=a\times b$ where a and b are the length of the perpendicular sides. Here: $A=6\times7=42$ square ft For four panels $4\times42=168$ square ft of material is needed

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