# Chapter 1 - Sections 1.1-1.8 - Exercises - Problems by Topic: 91d

$\approx 4.29$ $inches$

#### Work Step by Step

1. Use convertion $1mm = 0.0394 in$ 2. Mutiply mm by factor 0.0394 $109\times 0.0394 = 4.2913 \approx 4.29$

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