Answer:
$11799
Explanation:
The formula for Interest is I=(p)(r)(t)
I=Interest/The amount of money you got
P=Principal/Amount of money you put into the bank
R=Rate/Percentage divided by 100
T=Time in years/If in months then say 1/12
Then we can make the equation
I=9000 x (6.9 / 100) x 19
I=9000 x 0.069 x 19
I=621 x 19
I=11799
They will get $11799 in 19 years.