Seth is trying to pay off his credit card. he plans to pay it off in 24 months. interest on the card is compounded monthly at a fixed annual rate of 11.6%. seth currently has a balance of $18,875 on his credit card. use the formula for the sum of a finite geometric series to determine seth’s approximate monthly payment.

Respuesta :

The approximate monthly payment of Seth is calculated to be $844.99.

Using finite geometric series we get,

18875=  [C/(0.116÷12)] ×[1-(1/(1+(0.116÷12))²⁴] , where C is monthly payment.

⇒18875=(C/0.0097)×[1-(1/(1+0.0097)²⁴], here we calculated 0.116/12

⇒18875=(C/0.0097)×[1-(1/(1.0097)²⁴], here we put the value of (1+t)=(1+0.0097)=

⇒18875=(C/0.0097)×[1-(1/1.2607], here we calculated (1+t)ⁿ, n=24

⇒18875=(C/0.0097)×[(1.2607-1)/1.2607]

⇒18875= (C/0.0097)×(0.2067)

⇒(18875×0.0097)÷0.2067=C

⇒C=$885≈$844.99

Thus, monthly payment is approximately $844.99.

We used compound interest here as, credit card companies often tend to use compound interest on daily basis, adding to the principal amount daily, here monthly though. also it forms a Geometric series as difference in amount compounded in first month and then in succeeding months is of  r times which is the annual interest rate divided by number of  months here.

To learn more about compound interest click here brainly.com/question/24924853

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