Solution - Compound interest (basic)

44819.23

44819.23

Step-by-step explanation

Use $A = P {(1 + r / n)}^{(n t)}$ with $P = 21, 842$ , $r = 4 %$ , $n = 12$ , $t = 18$ .

Compute period rate and exponent: $\frac{r}{n} = 0.0033333333$ , $n t = 216$ , so the growth factor is $2.0519748277$ .

Multiply principal by growth factor: $21, 842$ × $2.0519748277$ = $44819.23$ .

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