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ICE Princess25 [194]
3 years ago
7

A credit card had an APR of 33.01% all of last year and compounded interest

Mathematics
1 answer:
ale4655 [162]3 years ago
8 0

Answer:

Option D - 39.09%

Step-by-step explanation:

Given : A credit card had an APR of 33.01% all of last year and compounded interest  daily.

To find : What was the credit card's effective interest rate last year?

Solution :

Effective annual rate formula is given by,

\text{APR}=(1+\dfrac{r}{n})^n-1

where, r is the interest rate i.e. r=33.01%=0.3301

n is the number of time period for which interest is compounded daily i.e. n=365.

Substitute in the formula,

\text{APR}=(1+\dfrac{0.3301}{365})^{365}-1

\text{APR}=(1+000904)^{365}-1

\text{APR}=(1.000904)^{365}-1

\text{APR}=1.39089-1

\text{APR}=0.39089

Into percentage,  

\text{APR}=0.39089\times 100

\text{APR}=39.089\%

\text{APR}\approx 39.09\%

Therefore, the credit card's effective interest rate last year is 39.09%.

So, Option D is correct.

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