Question 4 • 2025-2026 GSP Mathematical Reasoning for Decision Making
Use the fixed-payment loan formula with monthly interest rate 0.115 ÷ 12 = 0.0095833 and 12 × 12 = 144 payments. The payment is $85,600 × 0.0095833 ÷ [1 − (1 + 0.0095833)^−144], which is about $1,098.52. Therefore, the monthly payment was $1,098.52.
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