Math Problem Statement
Betty and Bob borrow $300,000 at 12% per annum compounded monthly for a 20-year (fixed rate) mortgage.
a. What is their monthly payment?
b. How much interest will they pay over the 20 years?
c. After 10 years how much equity will they have in their property, i.e. how much principal will they have paid?
Solution
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Math Problem Analysis
Mathematical Concepts
Compound Interest
Fixed-Rate Mortgage
Equity Calculation
Formulas
Monthly payment formula: M = P * (r(1+r)^n) / ((1+r)^n - 1)
Total interest formula: Total Interest = (M * n) - P
Remaining balance formula: B = P * ((1 + r)^n - (1 + r)^m) / ((1 + r)^n - 1)
Theorems
Compound Interest Theorem
Suitable Grade Level
College/University Level or Advanced High School
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