HP 12c Owners Manual

  Appendix D: Formulas Used  191 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 191 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Interest Rate Conversions 
C  = number of compounding periods per year. 
EFF  = the effective annual interest rate as a decimal. 
NOM  = the nominal annual interest rate as a decimal. 
 
Finite Compounding 
1 1−
⎟
⎠ ⎞
⎜
⎝ ⎛
+ =
C
C NOM
EFF 
Continuous Compounding 
) 1 (− =NOMe EFF 
Statistics 
Mean 
n
xx∑=   n
yy∑= 
Weighted M ean 
∑ ∑=
w...

192  Appendix D: Formulas Used 
 
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Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
()()
⎥ ⎥
⎦ ⎤
⎢ ⎢
⎣ ⎡
− ⋅
⎥ ⎥
⎦ ⎤
⎢ ⎢
⎣ ⎡
−⎥
⎦ ⎤
⎢
⎣ ⎡⋅
−
=∑∑
∑∑ ∑
∑∑
ny
y
nx
xny x
xy
r
2
2 2
2 
Standard Deviation 
()
) 1 (
2
2
− −
=
∑ ∑
n nx x n
sx  ()
) 1 (
2
2
− −
=
∑ ∑
n ny y n
sy 
Factorial 
0! = 1 
For n > 1 where n is an integer: 
∏=
=
n
i
i n
1
! 
The Rent or Buy Decision 
Market Value = PRICE(1 + I)n  
where: 
I= appreciation per...

 
193 
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  Appendix E 
Battery, Warranty, and 
Service Information 
Battery 
The hp 12c is shipped with one 3 Volt CR2023 Lithium battery. Battery life 
depends on how the calculator is used. If the calculator is being used to perform 
operations other than running programs, it uses much less power. 
Low-Power Indication 
A battery symbol (¼
) shown in the upper-left corner of the...

194  Appendix E: Battery, Warranty, and Service Information 
 
 
File name: hp 12c_users guide_English_HDPMBF12E44  Page: 194 of 209   
Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
To install a new battery, use the following procedure: 
 
1.  With the calculator turned off, slide the battery cover off. 
2.  Remove the old battery. 
3.  Insert a new battery, with positive polarity facing outward. 
4.  Replace the battery cover. 
Note:
 Be careful not to press any keys while the battery is...

  Appendix E: Battery, Warranty, and Service Information  195 
 
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Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
the ¼ battery power indicator) should turn on.*  If the display shows Error 9, 
goes blank, or otherwise does not show the proper result, the calculator 
requires service.
† 
Note: Tests of the calculator’s electronics are also performed if the = key 
or the z key is held down when ; is released.
‡  These tests...

196  Appendix E: Battery, Warranty, and Service Information 
 
 
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Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Warranty 
hp 12c Financial Calculator; Warranty period: 12 months 
1.  HP warrants to you, the end-user customer, that HP hardware, accessories 
and supplies will be free from defects in materials and workmanship after the 
date of purchase, for the period specified above. If HP receives notice of 
such defects...

  Appendix E: Battery, Warranty, and Service Information  197 
 
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Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Some countries, States or provinces do not allow the exclusion or limitation 
of incidental or consequential damages, so the above limitation or exclusion 
may not apply to you. 
8.  The only warranties for HP products and services are set forth in the express 
warranty statements accompanying such products and...

198  Appendix E: Battery, Warranty, and Service Information 
 
 
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Printered Date: 2005/7/29    Dimension: 14.8 cm x 21 cm 
 
Asia Pacific Country : Telephone numbers 
 Australia +61-3-9841-5211 
 Singapore +61-3-9841-5211 
    
L.America Country : Telephone numbers 
 Argentina 0-810-555-5520 
 Brazil  Sao Paulo 3747-7799; ROTC 
0-800-157751 
 Mexico  Mx City 5258-9922; ROTC 
01-800-472-6684 
 Venezuela 0800-4746-8368 
 Chile...

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Regulatory Information 
This section contains information that shows how the hp 12c financial calculator 
complies with regulations in certain regions. Any modifications to the calculator 
not expressly approved by Hewlett-Packard could void the authority to operate the 
12c in these regions. 
USA 
This...

200  Appendix E: Battery, Warranty, and Service Information 
 
 
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Disposal of Waste Equipment by Users in Private 
Household in the European Union 
This symbol on the product or on its packaging indicates that this 
product must not be disposed of with your other household waste. 
Instead, it is your responsibility to dispose of your waste 
equipment by handing it over to a...