How much would it cost him in interest over 5 months if he used card A to make the purchase?
1 answer:
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we know that
The compound interest formula is equal to
where
A is the Final Investment Value
P is the Principal amount of money to be invested
r is the rate of interest in decimal
t is Number of Time Periods
n is the number of times interest is compounded per year
in this problem we have
substitute in the formula above
therefore
<u>the answer is</u>