Math Problem Statement
Suppose the interest rate is
6.9 %6.9%
APR with monthly compounding. What is the present value of an annuity that pays
$ 90$90
every
sixsix
months for
sevenseven
years?
(Note:
Be careful not to round any intermediate steps less than six decimal places.)
Solution
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Math Problem Analysis
Mathematical Concepts
Annuities
Present Value
Interest Rates
Compounding
Formulas
Present value of an ordinary annuity: PV = P × (1 - (1 + r)^-n) ÷ r
Monthly interest rate: r_monthly = APR ÷ 12
Semiannual interest rate: r_semiannual = (1 + r_monthly)^6 - 1
Total number of periods: n = 7 years ÷ 0.5 years per period
Theorems
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Suitable Grade Level
Grades 11-12, College Introductory
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