Posted by **Amy** on Monday, September 5, 2011 at 3:51am.

invested 2000

gains 0.2 every odd numbered month

final value after first month?

i've tried solving this with a formula, but every formula i come up with is wrong.

Could someone tell me how to solve this and plug in the right numbers into a formula?

- Math -
**Reiny**, Monday, September 5, 2011 at 7:43am
Are we to assume that there is a 20% gain for every odd-numbered month and for the even-numbered months the investment stays constant?

Since the "first" month would be odd-numbered, the amount after the first month would simply be

2000(1.2) = 2400

the "formula" would simply be

amount = 2000(1 + .2)^1

- Math -
**Amy**, Monday, September 5, 2011 at 11:55am
for every even-numbered number month there is a 15% gain.

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