Solution - Compound interest (basic)

35472.62

35472.62

Step-by-step explanation

Use $A = P {(1 + r / n)}^{(n t)}$ with $P = 6, 660$ , $r = 9 %$ , $n = 2$ , $t = 19$ .

Compute period rate and exponent: $\frac{r}{n} = 0.045$ , $n t = 38$ , so the growth factor is $5.3262192144$ .

Multiply principal by growth factor: $6, 660$ × $5.3262192144$ = $35472.62$ .

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Compound interest appears in savings, loans, and investments. Understanding it builds strong financial literacy.