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Using the compound interest formula, determine the total amount paid back and the monthly payment. Buying a $6000 used sedan taken out with $500 paid up front and the rest borrowed at 8.3%annual interest compounded daily (365 days per year) over 2 years.

Sagot :

The final value of an investment or loan with compound interest is given by:

[tex]FV=P(1+\frac{r}{m})^{m\cdot t}[/tex]

Where P is the initial value (principal or loan), r is the annual interest rate, t is the duration of the investment/loan, and m is the number of compounding periods per year.

The following values are given in the problem:

P = $6000 - $500 = $5500

r = 8.3% = 0.083

t = 2 years

m = 365

Applying the formula:

[tex]FV=5500(1+\frac{0.083}{365})^{365\cdot2}[/tex]

Calculating:

[tex]FV=5500(1+0.0002273926)^{730}[/tex]

FV = $6493.03

The total amount paid back is $6493.03

This is equivalent to an approximate monthly payment of:

[tex]R=\frac{$ 6493.03 $}{24}=270.54[/tex]

The monthly payment is approximately $270.54