HP Prime Graphing Wireless Calculator Instrukcja Użytkownika Strona 371

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19 Finance app
The Finance app enables you to solve time-value-of-money (TVM) and amortization problems. You can use
the app to do compound interest calculations and to create amortization tables.
Compound interest is accumulative interest, that is, interest on interest already earned. The interest earned
on a given principal is added to the principal at specied compounding periods, and then the combined
amount earns interest at a certain rate. Financial calculations involving compound interest include savings
accounts, mortgages, pension funds, leases, and annuities.
Getting started with the Finance app
Suppose you nance the purchase of a car with a 5-year loan at 5.5% annual interest, compounded monthly.
The purchase price of the car is $19,500, and the down payment is $3,000. First, what are the required
monthly payments? Second, what is the largest loan you can aord if your maximum monthly payment is
$300? Assume that the payments start at the end of the rst period.
1.
To open the Finance app, press and then select Finance.
The app opens in the Numeric view.
2.
In the N eld, enter 5 12 and press .
Notice that the result of the calculation (60) appears in the eld. This is the number of months over a
ve-year period.
3.
In the I%/YR eld, enter 5.5—the interest rate—and press .
4.
In PV eld, enter 19500 3000 and press . This is the present value of the loan,
being the purchase price less the deposit.
Getting started with the Finance app 323
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