Answer:
She is to pay back $70,720
Explanation:
The total amount she is to pay back is simply the interest plus the principal. We have the principal and thus we need to calculate the interest.
Mathematically, S.I = PRT/100
P = $52,000
R = 9%
T = 4 years
S.I = (52000 * 9 * 4)/100 = $18,720
Amount to be paid back is thus 52,000 + 18,720 = $70,720