Select the correct answer.
Use the given formula to find the sum of a series.
0,(1 - )
Sn =
Stella is setting aside increasing amounts of money each month to save for a new laptop. In the first month, Stella sets aside $5. In the
second month, she sets aside $10, and in the third month, she sets aside $20.
If the pattern above continues, what is the total amount of money Stella will have saved after 6 months?
o
$256
$315
$155
$160