Answer:
$10.52
Step-by-step explanation:
(1137.45 x 14.7%) / 12 - (1137.45 x 3.6%) /12 = 10.52
The amount of interest that your friend save compared to the credit card at the end of the first month is $10.5.
First step
Interest at 14.7% APR
Interest=(1137.45 x 14.7%) / 12
Interest=$13.9
Interest at 3.6% APR
Interest=(1137.45 x 3.6%) /12
Interest = $3.4
Second step
Interest saved=$13.9-$3.4
Interest saved=$10.5
Therefore the amount of interest that your friend save compared to the credit card at the end of the first month is $10.5.
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