A credit card had an APR of 33.01% all of last year and compounded interestdaily. What was the credit card's effective interest rate last year?O A. 37.33%B. 38.49%Oc. 35.73%OD. 39.09%

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, [tex]\text{APR}=(1+\dfrac{r}{n})^n-1[/tex] where, r is the interest rate i.e. r=33.01%=0.3301n is the number of time period for which interest is compounded daily i.e. n=365. Substitute in the formula, [tex]\text{APR}=(1+\dfrac{0.3301}{365})^{365}-1[/tex] [tex]\text{APR}=(1+000904)^{365}-1[/tex] [tex]\text{APR}=(1.000904)^{365}-1[/tex] [tex]\text{APR}=1.39089-1[/tex] [tex]\text{APR}=0.39089[/tex] Into percentage,  [tex]\text{APR}=0.39089\times 100[/tex] [tex]\text{APR}=39.089\%[/tex][tex]\text{APR}\approx 39.09\%[/tex]Therefore, the credit card's effective interest rate last year is 39.09%.So, Option D is correct.