Using the formula I=P×r×t , calculate the interest accrued if Olivia borrowed $⁢9,000 at an annual interest rate of 4% for 1.5 years without making any payments.

Use I = P × r × t, with the rate written as a decimal: 4% = 0.04. Then I = 9,000 × 0.04 × 1.5 = 540. Olivia accrued 540 dollars in interest, so the correct choice is A, 540 dollars.

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