Question about Casio FX-115MS Plus Calculator

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4.7=-logka find -logka=4.7

Posted by Anonymous on

2 Answers

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  • Casio Master
  • 7,993 Answers

Log (k_a)=-4.7
-log(k_a)=4.7
-log(k_a)=0-log(k_a)=log(1)-log (k_a)=log(1/k_a)=4.7
Raise both members of the last equality to the power of 10
10^(log(1/k_a))=1/k_a=10^(4.7)
k_a=10^(-4.7)=1.99526*10^(-5)

Posted on Mar 23, 2014

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  • Master
  • 457 Answers

I assume you mean
4.7=-logka - b6f99112-cd6a-4c9f-8af0-ec0b8fcf8cf0.gif
This equation contains two unknowns: k and a, so I cannot give you a numeric result, nor can a calculator. However, you can express k as a function of a, or a as a function of k:


where ln is the natural logarithm base e=2.712818...

Posted on Mar 22, 2014

  • 4 more comments 
  • k24674 Mar 23, 2014

    The argument of a logarithm must be strictly greater than 0. ln(-4.7) is a complex number.

  • MiB8888 Mar 23, 2014

    Close. With -4.7 = -4.7 + 0i, In polar coordinates you get -4.7 * exp(i*pi).The logaritm of this number is

  • MiB8888 Mar 23, 2014

    Close. With -4.7 = -4.7 + 0i, In polar coordinates you get -4.7 * exp(i*pi).The logaritm of this number is

  • MiB8888 Mar 23, 2014

    Sorry... i hater this comment field...

  • MiB8888 Mar 23, 2014

    --- is ln(sqrt(-4.7^2 + 0^2) * i * (pi + 2n pi) = ln(4.7) * i * (2n+1) pi

  • k24674 Mar 30, 2014

    Context is everything. The problem, although not well stated, comes from chemistry where K subscript a (which I noted as k_a) is the equilibrium constant of some reversible reaction. In that context the constant, being a ratio of products of species concentrations is by definition a positive constant. Sorry, Expert. I meant no disrespect. I never add my grain of salt unless the answer supplied is faulty and I never say that it is faulty. I just present my answer and let the readers decide for themselves.

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Beep Code Manual


(I'm Computer Technician, I use these codes to trouble shoot hardware issues at my job. Enjoy.)

BIOS Beep Codes

When a computer is first turned on, or rebooted, it's BIOS performs a power-on self test (POST) to test the system's hardware, checking to make sure that all of the system's hardware components are working properly. Under normal circumstances, the POST will display an error message; however, if the BIOS detects an error before it can access the video card, it will produce a series of beeps, and the pattern of the beeps indicates what kind of problem the BIOS has detected. Because there are many brands of BIOS, there are no standard beep codes for every BIOS.

The two most-used brands are AMI (American Megatrends International) and Phoenix.

Below are listed the beep codes for AMI systems, and here are the beep codes for Phoenix systems.

AMI Beep Codes

Beep Code Meaning
1. beep DRAM refresh failure. There is a problem in the system memory or the motherboard.
2. beeps Memory parity error. The parity circuit is not working properly.
3. beeps Base 64K RAM failure. There is a problem with the first 64K of system memory.
4. beeps system timer not operational. There is problem with the timer(s) that control functions on the motherboard.
5. beeps Processor failure. The system CPU has failed.
6. beeps Gate A20/keyboard controller failure. The keyboard IC controller has failed, preventing gate A20 from switching the processor to protect mode.
7. beeps Virtual mode exception error.
8. beeps Video memory error. The BIOS cannot write to the frame buffer memory on the video card.
9. beeps ROM checksum error. The BIOS ROM chip on the motherboard is likely faulty.
10. beeps CMOS checksum error. Something on the motherboard is causing an error when trying to interact with the CMOS.
11. beeps Bad cache memory. An error in the level 2 cache memory.

1 long beep, 2 short Failure in the video system.
1 long beep, 3 short A failure in the video system.
1 long beep, 8 short display test failure.
Continuous beeping A problem with the memory or video.
BIOS Beep Codes

Phoenix Beep Codes

Phoenix uses sequences of beeps to indicate problems. The "-" between each number below indicates a pause between each beep sequence.
For example, 1-2-3 indicates one beep, followed by a pause and three beeps. Phoenix version before 4.x use 3-beep codes, while Phoenix versions starting with 4.x use 4-beep codes.
Click here for AMI BIOS beep codes.
4-Beep Codes

Beep Code Meaning
1-1-1-3 Faulty CPU/motherboard. Verify real mode.
1-1-2-1 Faulty CPU/motherboard.
1-1-2-3 Faulty motherboard or one of its components.
1-1-3-1 Faulty motherboard or one of its components. Initialize chipset registers with initial POST values.
1-1-3-2 Faulty motherboard or one of its components.
1-1-3-3 Faulty motherboard or one of its components. Initialize CPU registers.
1-1-3-2
1-1-3-3
1-1-3-4 Failure in the first 64K of memory.
1-1-4-1 Level 2 cache error.
1-1-4-3 I/O port error.
1-2-1-1 Power management error.
1-2-1-2
1-2-1-3 Faulty motherboard or one of its components.
1-2-2-1 Keyboard controller failure.
1-2-2-3 BIOS ROM error.
1-2-3-1 System timer error.
1-2-3-3 DMA error.
1-2-4-1 IRQ controller error.
1-3-1-1 DRAM refresh error.
1-3-1-3 A20 gate failure.
1-3-2-1 Faulty motherboard or one of its components.
1-3-3-1 Extended memory error.
1-3-3-3
1-3-4-1
1-3-4-3 Error in first 1MB of system memory.
1-4-1-3
1-4-2-4 CPU error.
1-4-3-1
2-1-4-1 BIOS ROM shadow error.
1-4-3-2
1-4-3-3 Level 2 cache error.
1-4-4-1
1-4-4-2
2-1-1-1 Faulty motherboard or one of its components.
2-1-1-3
2-1-2-1 IRQ failure.
2-1-2-3 BIOS ROM error.
2-1-2-4
2-1-3-2 I/O port failure.
2-1-3-1
2-1-3-3 Video system failure.
2-1-1-3
2-1-2-1 IRQ failure.
2-1-2-3 BIOS ROM error.
2-1-2-4 I/O port failure.
2-1-4-3
2-2-1-1 Video card failure.
2-2-1-3
2-2-2-1
2-2-2-3 Keyboard controller failure.
2-2-3-1 IRQ error.
2-2-4-1 Error in first 1MB of system memory.
2-3-1-1
2-3-3-3 Extended memory failure.
2-3-2-1 Faulty motherboard or one of its components.
2-3-2-3
2-3-3-1 Level 2 cache error.
2-3-4-1
2-3-4-3 Motherboard or video card failure.
2-3-4-1
2-3-4-3
2-4-1-1 Motherboard or video card failure.
2-4-1-3 Faulty motherboard or one of its components.
2-4-2-1 RTC error.
2-4-2-3 Keyboard controller error.
2-4-4-1 IRQ error.
3-1-1-1
3-1-1-3
3-1-2-1
3-1-2-3 I/O port error.
3-1-3-1
3-1-3-3 Faulty motherboard or one of its components.
3-1-4-1
3-2-1-1
3-2-1-2 Floppy drive or hard drive failure.
3-2-1-3 Faulty motherboard or one of its components.
3-2-2-1 Keyboard controller error.
3-2-2-3
3-2-3-1
3-2-4-1 Faulty motherboard or one of its components.
3-2-4-3 IRQ error.
3-3-1-1 RTC error.
3-3-1-3 Key lock error.
3-3-3-3 Faulty motherboard or one of its components.
3-3-3-3
3-3-4-1
3-3-4-3
3-4-1-1
3-4-1-3
3-4-2-1
3-4-2-3
3-4-3-1
3-4-4-1
3-4-4-4 Faulty motherboard or one of its components.
4-1-1-1 Floppy drive or hard drive failure.
4-2-1-1
4-2-1-3
4-2-2-1 IRQ failure.
4-2-2-3
4-2-3-1
4-2-3-3
4-2-4-1 Faulty motherboard or one of its components.
4-2-4-3 Keyboard controller error.
4-3-1-3
4-3-1-4
4-3-2-1
4-3-2-2
4-3-3-1
4-3-4-1
4-3-4-3 Faulty motherboard or one of its components.
4-3-3-2
4-3-3-4 IRQ failure.
4-3-3-3
4-3-4-2 Floppy drive or hard drive failure.
3-Beep Codes
Beep Code Meaning
1-1-2 Faulty CPU/motherboard.
1-1-3 Faulty motherboard/CMOS read-write failure.
1-1-4 Faulty BIOS/BIOS ROM checksum error.
1-2-1 System timer not operational. There is a problem with the timer(s) that control functions on the motherboard.
1-2-2
1-2-3 Faulty motherboard/DMA failure.
1-3-1 Memory refresh failure.
1-3-2
1-3-3
1-3-4 Failure in the first 64K of memory.
1-4-1 Address line failure.
1-4-2 Parity RAM failure.
1-4-3 Timer failure.
1-4-4 NMI port failure.
2-_-_ Any combination of beeps after 2 indicates a failure in the first 64K of memory.
3-1-1 Master DMA failure.
3-1-2 Slave DMA failure.
3-1-3
3-1-4 Interrupt controller failure.
3-2-4 Keyboard controller failure.
3-3-1
3-3-2 CMOS error.
3-3-4 Video card failure.
3-4-1 Video card failure.
4-2-1 Timer failure.
4-2-2 CMOS shutdown failure.
4-2-3 Gate A20 failure.
4-2-4 Unexpected interrupt in protected mode.
4-3-1 RAM test failure.
4-3-3 Timer failure.
4-3-4 Time of day clock failure.
4-4-1 Serial port failure.
4-4-2 Parallel port failure.
4-4-3 Math coprocessor.

Good luck!

on Dec 31, 2009 | Computers & Internet

1 Answer

What word can you make by using letters bonnecewikort


This is not the appropriate place to ask this question, try miscellaneous next time. Try this next time WinEveryGame Word Builder
8 cowinner 8 beckoner 7 wonkier 7 winnock 7 wennier 7 rewoken 7 nonwork 7 newborn 7 einkorn 7 brownie 7 brookie 7 boronic 7 bonnock 7 bonnier 7 bicorne 6 wonner 6 winner 6 winker 6 wincer 6 wiener 6 wicker 6 weiner 6 rookie 6 ronion 6 rewoke 6 renown 6 recook 6 recoin 6 reckon 6 rebook 6 rebeck 6 orcein 6 nicker 6 newbie 6 necker 6 krooni 6 kronen 6 knower 6 ionone 6 inborn 6 erenow 6 enrobe 6 encore 6 cowrie 6 cowier 6 corbie 6 cookie 6 cooker 6 conner 6 conker 6 conine 6 coiner 6 bronco 6 broken 6 boreen 6 bookie 6 booker 6 bonnie 6 bonier 6 bicron 6 bicorn 6 bicker 6 beckon 5 wrick 5 wreck 5 wooer 5 woken 5 wince 5 weber 5 rowen 5 robin 5 rewon 5 rewin 5 renin 5 renew 5 reink 5 recon 5 rebec 5 owner 5 orcin 5 oorie 5 onion 5 ocker 5 nonce 5 niece 5 nicer 5 newie 5 newer 5 kroon 5 krone 5 koine 5 known 5 kerne 5 irone 5 iroko 5 inner 5 inker 5 icker 5 enoki 5 eikon 5 ebook 5 crown 5 croon 5 crook 5 crone 5 creek 5 cower 5 cooer 5 cooee 5 conin 5 brown 5 brook 5 bronc 5 broke 5 brock 5 brink 5 brine 5 brick 5 bower 5 boron 5 borne 5 boric 5 bonne

5 biker 5 benni 5 benne 4 wren 4 worn 4 work 4 wore 4 wonk 4 woke 4 wire 4 wino 4 wink 4 wine 4 wick 4 were 4 weir 4 weer 4 ween 4 week 4 rook 4 rock 4 robe 4 rink 4 rick 4 rice 4 rein 4 reek 4 reck 4 once 4 oink 4 oboe 4 nori 4 noon 4 nook 4 none 4 noir 4 nock 4 nine 4 nick 4 nice 4 neon 4 nene 4 neck 4 kore 4 kobo 4 know 4 knob 4 knew 4 knee 4 kirn 4 kino 4 kine 4 kier 4 kibe 4 kern 4 kerb 4 keno 4 keir 4 keen 4 iron 4 inro 4 ikon 4 icon 4 ewer 4 erne 4 enow 4 ebon 4 crow 4 crib 4 crew 4 corn 4 cork 4 core

4 cook 4 conn 4 conk 4 coni 4 cone 4 coke 4 coir 4 coin 4 cire 4 cion 4 cine 4 cero 4 cere 4 brow 4 broo 4 brio 4 brin 4 brie 4 brew 4 bren 4 bree 4 born 4 bork 4 bore 4 boor 4 boon 4 book 4 bonk 4 bone 4 bock 4 biro 4 birk 4 bine 4 bike 4 bier 4 bice 4 berk 4 bene 4 beer 4 been 4 beck 3 woo 3 won 3 wok 3 woe 3 win 3 wen 3 wee 3 web 3 row 3 roe 3 roc 3 rob 3 rin 3 rib 3 rei 3 ree 3 rec 3 reb 3 own 3 owe 3 ore 3 orc 3 orb 3 ono 3 one 3 oke 3 obi 3 obe 3 now 3 nor 3 noo 3 nob 3 nib 3 new 3 nee 3 neb 3 kor 3 koi 3 kob 3 kir 3 kin 3 ken 3 irk 3 ire 3 ion 3 inn 3 ink 3 ick 3 ice 3 ewe 3 ern 3 ere 3 eon 3 eke 3 eek 3 cow 3 cor 3 coo 3 con 3 cob 3 cee 3 bro 3 bow 3 boo 3 bio 3 bin 3 ben 3 bee 2 wo 2 we 2 re 2 ow 2 or 2 on 2 oi 2 oe 2 no 2 ne 2 ki 2 in 2 er 2 en 2 bo 2 bi 2 be

Nov 02, 2015 | Computers & Internet

1 Answer

-logka=4.7


log (k_a)=-4.7
-log(k_a)=4.7
-log(k_a)=0 - log(k_a)=log(1)-log (k_a)=
=log(1/k_a)=4.7
Raise both members of the last equality to the power of 10
10^(log(1/k_a))=1/k_a=10^(4.7)
k_a=10^(-4.7)=1.99526*10^(-5)

Mar 22, 2014 | Office Equipment & Supplies

2 Answers

4 - 4 - 4 - 4 =20 put mathematic signs (+,-,*,/) in the blanks and try to find a correct way.


This is the classic "Four Fours" problem. Combine the four fours as
4 / 4 + 4 * 4 with the operations taking place from left to right. The first 4 divided by the second produces 1. Add the third 4 to produce 5. Multiply by the fourth 4 results in 20.

Feb 06, 2013 | Computers & Internet

1 Answer

My problem is my passworg


Nuisance post I think.

Oct 10, 2012 | Cell Phones

1 Answer

How can I translate the motherboard beeps on startup


AMI Beep Codes

Beep Code Meaning
1. beep DRAM refresh failure. There is a problem in the system memory or the motherboard.
2. beeps Memory parity error. The parity circuit is not working properly.
3. beeps Base 64K RAM failure. There is a problem with the first 64K of system memory.
4. beeps system timer not operational. There is problem with the timer(s) that control functions on the motherboard.
5. beeps Processor failure. The system CPU has failed.
6. beeps Gate A20/keyboard controller failure. The keyboard IC controller has failed, preventing gate A20 from switching the processor to protect mode.
7. beeps Virtual mode exception error.
8. beeps Video memory error. The BIOS cannot write to the frame buffer memory on the video card.
9. beeps ROM checksum error. The BIOS ROM chip on the motherboard is likely faulty.
10. beeps CMOS checksum error. Something on the motherboard is causing an error when trying to interact with the CMOS.
11. beeps Bad cache memory. An error in the level 2 cache memory.

1 long beep, 2 short Failure in the video system.
1 long beep, 3 short A failure in the video system.
1 long beep, 8 short display test failure.
Continuous beeping A problem with the memory or video.
BIOS Beep Codes

Phoenix Beep Codes

Phoenix uses sequences of beeps to indicate problems. The "-" between each number below indicates a pause between each beep sequence.
For example, 1-2-3 indicates one beep, followed by a pause and three beeps. Phoenix version before 4.x use 3-beep codes, while Phoenix versions starting with 4.x use 4-beep codes.
Click here for AMI BIOS beep codes.
4-Beep Codes

Beep Code Meaning
1-1-1-3 Faulty CPU/motherboard. Verify real mode.
1-1-2-1 Faulty CPU/motherboard.
1-1-2-3 Faulty motherboard or one of its components.
1-1-3-1 Faulty motherboard or one of its components. Initialize chipset registers with initial POST values.
1-1-3-2 Faulty motherboard or one of its components.
1-1-3-3 Faulty motherboard or one of its components. Initialize CPU registers.
1-1-3-2
1-1-3-3
1-1-3-4 Failure in the first 64K of memory.
1-1-4-1 Level 2 cache error.
1-1-4-3 I/O port error.
1-2-1-1 Power management error.
1-2-1-2
1-2-1-3 Faulty motherboard or one of its components.
1-2-2-1 Keyboard controller failure.
1-2-2-3 BIOS ROM error.
1-2-3-1 System timer error.
1-2-3-3 DMA error.
1-2-4-1 IRQ controller error.
1-3-1-1 DRAM refresh error.
1-3-1-3 A20 gate failure.
1-3-2-1 Faulty motherboard or one of its components.
1-3-3-1 Extended memory error.
1-3-3-3
1-3-4-1
1-3-4-3 Error in first 1MB of system memory.
1-4-1-3
1-4-2-4 CPU error.
1-4-3-1
2-1-4-1 BIOS ROM shadow error.
1-4-3-2
1-4-3-3 Level 2 cache error.
1-4-4-1
1-4-4-2
2-1-1-1 Faulty motherboard or one of its components.
2-1-1-3
2-1-2-1 IRQ failure.
2-1-2-3 BIOS ROM error.
2-1-2-4
2-1-3-2 I/O port failure.
2-1-3-1
2-1-3-3 Video system failure.
2-1-1-3
2-1-2-1 IRQ failure.
2-1-2-3 BIOS ROM error.
2-1-2-4 I/O port failure.
2-1-4-3
2-2-1-1 Video card failure.
2-2-1-3
2-2-2-1
2-2-2-3 Keyboard controller failure.
2-2-3-1 IRQ error.
2-2-4-1 Error in first 1MB of system memory.
2-3-1-1
2-3-3-3 Extended memory failure.
2-3-2-1 Faulty motherboard or one of its components.
2-3-2-3
2-3-3-1 Level 2 cache error.
2-3-4-1
2-3-4-3 Motherboard or video card failure.
2-3-4-1
2-3-4-3
2-4-1-1 Motherboard or video card failure.
2-4-1-3 Faulty motherboard or one of its components.
2-4-2-1 RTC error.
2-4-2-3 Keyboard controller error.
2-4-4-1 IRQ error.
3-1-1-1
3-1-1-3
3-1-2-1
3-1-2-3 I/O port error.
3-1-3-1
3-1-3-3 Faulty motherboard or one of its components.
3-1-4-1
3-2-1-1
3-2-1-2 Floppy drive or hard drive failure.
3-2-1-3 Faulty motherboard or one of its components.
3-2-2-1 Keyboard controller error.
3-2-2-3
3-2-3-1
3-2-4-1 Faulty motherboard or one of its components.
3-2-4-3 IRQ error.
3-3-1-1 RTC error.
3-3-1-3 Key lock error.
3-3-3-3 Faulty motherboard or one of its components.
3-3-3-3
3-3-4-1
3-3-4-3
3-4-1-1
3-4-1-3
3-4-2-1
3-4-2-3
3-4-3-1
3-4-4-1
3-4-4-4 Faulty motherboard or one of its components.
4-1-1-1 Floppy drive or hard drive failure.
4-2-1-1
4-2-1-3
4-2-2-1 IRQ failure.
4-2-2-3
4-2-3-1
4-2-3-3
4-2-4-1 Faulty motherboard or one of its components.
4-2-4-3 Keyboard controller error.
4-3-1-3
4-3-1-4
4-3-2-1
4-3-2-2
4-3-3-1
4-3-4-1
4-3-4-3 Faulty motherboard or one of its components.
4-3-3-2
4-3-3-4 IRQ failure.
4-3-3-3
4-3-4-2 Floppy drive or hard drive failure.
3-Beep Codes
Beep Code Meaning
1-1-2 Faulty CPU/motherboard.
1-1-3 Faulty motherboard/CMOS read-write failure.
1-1-4 Faulty BIOS/BIOS ROM checksum error.
1-2-1 System timer not operational. There is a problem with the timer(s) that control functions on the motherboard.
1-2-2
1-2-3 Faulty motherboard/DMA failure.
1-3-1 Memory refresh failure.
1-3-2
1-3-3
1-3-4 Failure in the first 64K of memory.
1-4-1 Address line failure.
1-4-2 Parity RAM failure.
1-4-3 Timer failure.
1-4-4 NMI port failure.
2-_-_ Any combination of beeps after 2 indicates a failure in the first 64K of memory.
3-1-1 Master DMA failure.
3-1-2 Slave DMA failure.
3-1-3
3-1-4 Interrupt controller failure.
3-2-4 Keyboard controller failure.
3-3-1
3-3-2 CMOS error.
3-3-4 Video card failure.
3-4-1 Video card failure.
4-2-1 Timer failure.
4-2-2 CMOS shutdown failure.
4-2-3 Gate A20 failure.
4-2-4 Unexpected interrupt in protected mode.
4-3-1 RAM test failure.
4-3-3 Timer failure.
4-3-4 Time of day clock failure.
4-4-1 Serial port failure.
4-4-2 Parallel port failure.
4-4-3 Math coprocessor.

Jul 26, 2012 | Sony VAIO PCV-RX850 (T99861067) PC Desktop

1 Answer

1 3/4 + [ (4/5 + 1/5 + 2 1/2) - (8 1/4 - 5/6 ] =


1 3/4 [ (4/5 1/5 2 1/2) - (8 1/4 - 5/6 )] = -2 1/6

How to do it:
1 3/4 [ (4/5 1/5 2 1/2) - (8 1/4 - 5/6) ] =
1 3/4 [(1 2 1/2) - (8 1/4 - 5/6) =
1 3/4 [3 1/2 - (8 1/4 - 5/6)] =
1 3/4 [3 1/2 - (33/4 - 5/6)]=
1 3/4 [3 1/2 - ((33/4*6/6) - (5/6*4/4))] =
1 3/4 [3 1/2 - ((198/24) - (20/24))]=
1 3/4 [3 1/2 - (178/24)]=
1 3/4 [7/2 - 178/24]=
1 3/4 [(7/2*12/12) - 178/24] =
1 3/4 [84/24 - 178/24] =
1 3/4 [-94/24] =
1 3/4 [-3 22/24] =
1 3/4 [-3 11/12] =
1 3/4 - 3 11/12
(7/4*3/3) - 47/12 =
21/12 - 47/12 =
-26/12 =
-2 2/12 =
-2 1/6




Sep 02, 2010 | Kitchen Ranges

1 Answer

Calculate sixty-nine to the third power using only 4 and 7 digit. In the calculater, you only allow to use 4 and 7 digit to get the answer for sixty-nine to the third power. what are the steps to do this?...


  1. You need no calculator to do that.
  2. I fail to perceive any redeeming value to this endeavor of yours.
  3. Here are your steps.
  • 69=64+1+4 =4^3 +(4/4) +4=4^(7-4) + (4/4) +4
  • 69^3= {4^(7-4) + (4/4) +4}^(7-4).
So? I do not feel any the smarter for answering this taunt. Rather the contrary.

Feb 25, 2010 | Texas Instruments TI-89 Calculator

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