Answer:
$3,247.18
Explanation:
Interest = Principal (P) x Rate (R) x Time (T)
Where:
Principal (P) is $13,894.81
Rate (R) is 3.9% expressed as a decimal (0.039)
Time (T) is 6 years
Interest = $13,894.81 x 0.039 x 6 = $3,247.18
So, the interest earned on $13,894.81 at a 3.9% interest rate over 6 years is $3,247.18.