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Aaron took out a 30-year mortgage for $100,000 at 7%. How much will he pay over one year? (Hint: multiply the monthly mortgage payment by 12.)

Sagot :

From the statement of the problem, we know the following data of the mortgage:

• t = time = 30 years,

,

• P = principal = $100,000,

,

• r = interest rate in decimal = 7/100 = 0.07.

The monthly payments are given by the following formula:

[tex]m=\frac{P\cdot\frac{r}{12}}{1-(1+\frac{r}{12})^{-t\cdot12}}\text{.}[/tex]

Replacing the data of the problem, we find that the monthly payments will be:

[tex]m=\frac{100,000\cdot\frac{0.07}{12}}{1-(1+\frac{0.07}{12})^{-30\cdot12}}\cong665.302.[/tex]

dollars.

The money that Aaron will pay in a year is 12 times the value of the monthly payment:

total of a year = 12 * $665.302 ≅ $7983.63.

Answer

Aaron will pay $7983.63 in a year.

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