331

a) 25*12=300

b) $\frac{1{,}3\%}{12}=0{,}108333...$
$q=1{,}0010833...$

$A=K\cdot q^n\cdot\frac{1-q}{1-q^n}$
$A=115000€\cdot1{,}0010833...^{300}\cdot\frac{1-1{,}0010833...}{1-1{,}0010833...^{300}}=449{,}1968...\approx449{,}20€$