exam Maths Puzzle Numerical Ability

x^3-27 over 5x^2+15x+45

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exam Other Question

Lee received an $8500 loan with interest at 9% for 126 days on May 4. Lee made a payment of $4000 on July 2.
A) what is the day of maturity of the loan?
B) how much did she owe
x^-1.5=27 . . . . . . I know that the answer is 1/9, but I have no idea how to get there.