Respuesta :
Answer:
The interest on investment of $9000 and $1000 is 5.41 % and 4.81% respectively.
Explanation:
Let i be the interest rate on $ 9000 investment, then
9000i + 1000(i -0.006) = $ 535
10,000i = 541
i = 5.41 % on investment of $ 9000.
than on $1000 investment interest = 5.41-0.6 = 4.81 %