Can anybody help me check my answers?

Question

anonymous · Answer

Fay opens a credit card with an APR of 15.25% compounded monthly. how much is charged in interest this month if her balance is $1,300?
*$16.52*
$15.25
$108.33
$198.25

mathstudent55 · Answer

Correct.
15.25% of $1300 divided by 12.
Notice how one choice is $198.25 in case you forget to divide by 12.

anonymous · Answer

A=P(1+r)^nt

anonymous · Answer

Thank you! Hugh opened a credit card at a department store with an APR of 19.15% compounded semiannually. what is the APY on this credit card?
9.58%
*20.07%*
25.56%
38.30%

jim_thompson5910 · Answer

APY = annual percentage yield APR = annual percentage rate n = compounding frequency $$\Large \text{APY} = \left(1+\frac{\text{APR}}{n}\right)^{n}-1$$ $$\Large \text{APY} = \left(1+\frac{0.1915}{2}\right)^{2}-1$$ $$\Large \text{APY} = \left(1+0.09575\right)^{2}-1$$ $$\Large \text{APY} = \left(1.09575\right)^{2}-1$$ $$\Large \text{APY} = 1.2006680625-1$$ $$\Large \text{APY} = 0.2006680625$$ $$\Large \text{APY} = 0.2006680625*100\%$$ $$\Large \text{APY} = 20.06680625\%$$ The APY is approximately 20.067% Source: http://www.financeformulas.net/Annual_Percentage_Yield.html

anonymous · Answer

ill help