Answer
$S_4=936$
Work Step by Step
Using $S_n=\dfrac{a_1(1-r^n)}{1-r}$, with $a_1=6$ and $r=5$, then,
\begin{array}{l}
S_4=\dfrac{6(1-5^4)}{1-5}\\\\
S_4=\dfrac{6(-624)}{-4}\\\\
S_4=936
.\end{array}
Intermediate Algebra (6th Edition)
by Martin-Gay, Elayn
Published by
Pearson
ISBN 10:
0321785045
ISBN 13:
978-0-32178-504-6
Chapter 11 - Review - Page 668: 53
Update this answer!
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.
