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02_02_07.html
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<!DOCTYPE html>
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<head>
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<title>Exercise 2.2.7</title>
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<h1 class="title toc-ignore">Exercise 2.2.7</h1>
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<blockquote>
<p>Suppose that a pipeline network is to have 30 links. For each link, there are 2 choices: The pipe may be any one of 7 sizes and any one of 3 materials. How many different pipeline networks are there?</p>
</blockquote>
<p><span class="math display">\[(7 \cdot 3)^{30}\]</span></p>
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