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Answer:
11.92%
Explanation:
The computation of the simple interest per year is shown below:
Future value would be
= Deposited Amount × (1 + rate of interest)^years
= $3,700 × (1 + 7.1%)^9
= $6,859.73
Now the simple interest is
= (Future value ÷ deposit) - 1 ÷ number of year
= ($6,859.73 ÷ $4,000) - 1 ÷ 9
= 0.71493 ÷ 9
= 11.92%