Question about Texas Instruments Office Equipment & Supplies

Hello,

You should use the equivalence

**y=10^(x) is equivalent to x=log(y)**

You should not use word that have no meaning. x above is sometimes called antilog, not reverse log.

The relation linkin pH and pOH is as follows

** pH+pOH=14,** thus **pH=14-pOH**

Let c[H+] be the concentation (or if you use the hydronium ion, instead of H+ ) c[H3O+] the concentration of hydronium ion)

c[H+]=c[H3O+]=10^(-pH)

pOH= 6.95 thus pH=14-6.95 = 7.05

If pH=7.05 the c[H+]= 10 ^(-7.05) =8.9125E(-8)

pH= **10^ [X to the power] [(-)]7.05 **

The key/buttom to raise to the power is the one to the right of x squared

Hope it helps

Posted on Sep 10, 2009

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Posted on Jan 02, 2017

To find percentages on this calculator, or any calculator, you divide one number by the other, and multiply the result by 100.

For example, for 2 out of 5, we type in 2, hit the divide button, type in 5 and hit the equals sign and we will get 0.4. To make this into percentage, we then multiply the answer by 100 to get 40%.

Good luck,

Paul

For example, for 2 out of 5, we type in 2, hit the divide button, type in 5 and hit the equals sign and we will get 0.4. To make this into percentage, we then multiply the answer by 100 to get 40%.

Good luck,

Paul

Oct 27, 2016 | Staples Office Equipment & Supplies

Dont know what you are saying.

Basically turn it off and on if your stuck.

Basically turn it off and on if your stuck.

Jan 05, 2016 | Staples SPL-250 10-Digit Display...

On the Staples Scientific Calculator BD-107i, I can't find the fraction function. I don't think there is one.

Mar 02, 2013 | Staples Office Equipment & Supplies

Download manual for: Casio fx-115ES, fx-570ES, fx-991ES, any should do the job. Download the Appendix, too.

http://support.casio.com/en/manual/manuallist.php?cid=004

http://support.casio.com/en/manual/manuallist.php?cid=004

Nov 28, 2011 | Office Equipment & Supplies

above the DEL key, you should have a button S (2 sided arrows) D. press that, and it will give you the decimal value. If you know how to use this calculator, it is a great help in almost any math course.

cheers

cheers

Jan 07, 2011 | Texas Instruments TI-89 Calculator

I want to set up the tax rate on my BD-6235T Staples calculator ??

Dec 18, 2010 | Office Equipment & Supplies

Here is the link to the calculator manual. It will show you how to do square root calculations, percentages, other roots, and logs. As to ratios and proportions you will have to read your mathematics textbook.

Aug 26, 2010 | Texas Instruments TI-30XA Calculator

http://www.product-support-staples.com/DisplaySKU_fr.aspx?SKU=BD-6120G

Aug 20, 2010 | Office Equipment & Supplies

What is BIN at the top of the screen? How do you get rid of it?

Jun 19, 2010 | Staples SPLP500 Scientific Calculator

Hello,

There is something missing in the formulation.

Any way you cannot calculate it directly on this calculator.You need to use the formula

**log_5 (a)= ln(a) x log_5 (e) **a is a positive integer

where** log_5** means log in base 5 (my notation for the function)

**e** is the base of the natural logarithms (e=2.71928 )

**ln** is the natural log function

To obtain a more accurate value of e, calculate e^(1)

Here are some values of log(e) in different bases (for you to play with)

log_2(e)= 1.442695041

log_3(e)=0.9102392266

log_4(e)=0.7213475204

log_5(e)=0.6213349346

log_6(e)=0.5581106266

log_7(e)=0.5138983424

log_8(e)=0.4808983470

log_9(e)=0.4551196133

log_10(e)=log(e)=0.4342944819

If you have to use log in bases other than 10 or e, you will need a claculator that does that at the touch of a button. Some calculators that handle these calculations are the Casio FX-300ES, FX-115ES,FX-991ES, those called Natural Display, or WriteView(Sharp) or Textbook display.

Hope it helps.

There is something missing in the formulation.

Any way you cannot calculate it directly on this calculator.You need to use the formula

where

To obtain a more accurate value of e, calculate e^(1)

Here are some values of log(e) in different bases (for you to play with)

log_2(e)= 1.442695041

log_3(e)=0.9102392266

log_4(e)=0.7213475204

log_5(e)=0.6213349346

log_6(e)=0.5581106266

log_7(e)=0.5138983424

log_8(e)=0.4808983470

log_9(e)=0.4551196133

log_10(e)=log(e)=0.4342944819

If you have to use log in bases other than 10 or e, you will need a claculator that does that at the touch of a button. Some calculators that handle these calculations are the Casio FX-300ES, FX-115ES,FX-991ES, those called Natural Display, or WriteView(Sharp) or Textbook display.

Hope it helps.

Sep 03, 2009 | Texas Instruments TI-30XA Calculator

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