# math

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Suppose a car cost 32000 and you are allowed to make a down payment of 20%, but have to borrow the remaining 80%. If you are allowed 5 years to pay back the loan, how much will you pay back monthly?

• math -

What interest rate is your lender charging you?

Without figuring interest,

32,000 * 0.8 = 25,600

25,600 / 60 = ?

• math -

The interest rate is 3.69%

• math -

let the monthly payment be P
i = .0369/12 = .003075
n = 60
80% of 32000 = 25600

P( 1 - 1.003075^-60)/.003075 = 25600
P = \$467.89

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