Answer
14.398.193
Work Step by Step
Here $a=4.000.000$ and $r=\frac{3}{4}$
The summation is from $i=1$ to $n-1=7 \rightarrow n=8$
${\Sigma}4.000.000(\frac{3}{4})^{i}=4.000.000(\frac{(\frac{3}{4})^{8}-1}{\frac{3}{4}-1}) \approx 14.398.193$
Calculus with Applications (10th Edition)
by Lial, Margaret L.; Greenwell, Raymond N.; Ritchey, Nathan P.
Published by
Pearson
ISBN 10:
0321749006
ISBN 13:
978-0-32174-900-0
Chapter 12 - Sequences and Series - 12.1 Geometric Sequences - 12.1 Exercises - Page 613: 40
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