## College Algebra (11th Edition)

Published by Pearson

# Chapter 7 - Section 7.1 - Sequences and Series - 7.1 Exercises - Page 636: 68

#### Answer

$100$

#### Work Step by Step

$\bf{\text{Solution Outline:}}$ To evaluate the given expression, $\displaystyle\sum_{i=1}^{20} 5 ,$ use the properties of summation. $\bf{\text{Solution Details:}}$ Using a property of the summation which is given by $\displaystyle\sum_{i=1}^n c=nc,$ the expression above is equivalent to \begin{array}{l}\require{cancel} 20(5) \\\\= 100 .\end{array}

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