Final answer:
The correct answer is C.The maturity value of the note is $21,420.
Step-by-step explanation:
The maturity value of a note is calculated by adding the principal amount and the interest earned.
In this case, the principal amount is $20,400 and the interest rate is 5%.
To calculate the interest earned, we multiply the principal amount by the interest rate: $20,400 x 0.05 = $1,020.
So, the total amount at maturity is the sum of the principal amount and the interest earned:
$20,400 + $1,020 = $<<20400+1020=21420>>21,420.