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15. 3 al37. Finance You plan to take out a 30-year fixed-rate mortgage for $300,000. Let Air) be your monthly payment if the interest rate is ro per year, compounded monthly. Interpret the given equations, including units. (@) P(5) = 1.610.46 (b) P'(3) = 183.3739. Finance You plan to take out a 30-year fixed-rate mortgage and you want your monthly payment to be $1200. The amount of the loan you can afford depends on the interest rate you will have to pay. Let A() be the amount of the money you can bor- row If the interest rate is ro per year, compounded monthly. Interpret the given equations, including units. () A(5) = 223.537.94 (b) A'(5) = -25.449.21