Answer:
= $44.19
Step-by-step explanation:
APR = 19%
Billing cycle = 30 days
Balance = $2830
Let's first find the daily rate,
Daily rate = 
The daily rate = 0.000521
To calculate the amount Shirley was charged interest for the billing cycle, we use:
Daily rate * billing cycle * balance
Where,
Daily rate
= 
Billing cycle = 30 days
Balance = $2830
Therefore, expression to be used =

Answer: For this, you need to equal the equations to each other, then combine like terms and subtract from both sides :).
Step-by-step explanation:
Answer:
the answer is 60.47 ; 64 ; 64.07 ; 64.7 that mean the answer is B.