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Verified Answer :

toporc

The formula to use is:
\(S_{n} =\frac{a(1-r^{n})}{1-r}\)
\(S_{5} =\frac{10(1-0.2^{5})}{1-0.2}=12.496\)
The answer is 12.496

Answer:

1562/125

Step-by-step explanation:

in improper fraction form

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