20 Most Recent Texas Instruments TI-30XA Calculator - Page 3 Questions & Answers

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2ND [FIX] 4

No need to. If you are using a Windows computer, look in Start>>AllPrograms>> Accessories>>Calculator.
Configure it as scientific and it will do pretty much what you want.
If you need help, click the Help menu.
If you want do download a TI83Plus calculator to install on your computer and use at your leisure, post a comment here and I will give you the link.

Press [2nd][sin]

This simple scientific calculator does not factor polynomials. Get a calculator with a Computer Algebra System.

The result depends on the angle unit you have selected for calculator. If your angle values should be in degrees, set angle unit to degree.

Use parentheses. If you do not have parentheses (doubtful), calculate first SQRT(2)/2 = Result is displayed and saved in ANS memory. Now calculate the arc tan of ANS.

Use the rules for exponents and you will calculate it by hand (1*10^-14)/(5*10^-12)=(1/5)*10^(-14+12)= 0.2*10^-2=2*10-3 To enter powers of 10 use the short-cut key [EE] For example to enter 6.02*10^23 type in 6.02* [EE] 23. When you use the EE key, the base (10) should not appear.

Enter the number and press the square root key. Make sure number whose root you are calculating is positive.

What does that mean adding? Displaying extra zeros? If that is the case Press [2nd][.] and limit the number of decimal you want. You can put the calculator in FLOating mode: Press 2nd DRG and choose FLO.

The inverse of the decimal log is RAISING to power of 10. They share the same physical key.

Use the power key which may be marked as [^] or [Y^y] or [X^y].

pH=-log( Concentration in mol/Liter)

Sorry. Not clear.

The TI-30Xa does not have a statistics mode. That statistics operations are available at all times, just like addition and subtraction. Just enter the data with Sigma-plus and then calculate the desired statistics---mean, standard deviation, and so forth.

Full details are in the "One-Variable Statistics" section of the guidebook (page 9 in my copy). If you need the guidebook, you can download one from
http://education.ti.com/calculators/downloads/US/Guidebooks/Detail?id=6132

Sorry, the TI-30x doesn't have the cumulative normal probability function built-in.

You don't. Angles can be measured using three different units: degrees (360 degrees in a circle), radians (2pi radians in a circle), or grads (400 grads in a circle). Pressing the DRG key cycles through the three modes. No matter which mode you select, one of the annunciators will appear on the screen to indicate the current mode.

It means your calculator is set to degrees mode. Angles can be measured using three different units: degrees (360 degrees in a circle), radians (2pi radians in a circle), or grads (400 grads in a circle). Pressing the DRG key cycles through the three modes. No matter which mode you select, one of the annunciators will appear on the screen to indicate the current mode.

A cubic foot is a unit of volume. A pound can be a unit od mass (weight) or a currency. Either way a volume cannot be converted into a mass nor a currency.
If you are doing homework read carefully the question to figure out what substance they are talking about.
Once you know the substance look up its density or specific gravity and do the calculation
mass (in pouunds) =density (in pounds per cubic foot) * volume (in cubic feet)

As you see, if you know the density (specific gravity) in pounds per cubic foot, you can calculate the mass of any volume of that substance (in cubic feet).

And please, never try to convert a volume into a mass.

pH=-log[c] where [c] is the concentration in mol/L