# 20 Most Recent Texas Instruments TI-84 Plus Calculator - Page 9 Questions & Answers

I am just going to be frank here, you have to do the math. Move the decimal over a couple spaces and you will be fine. You can post back if you need to know how to convert it. Th ti-84 can't do everything. You need the ti 89 to do more advance things, which I don't think you need.

Texas... | Answered on Apr 01, 2014

Press 2ND [TEST] 3. TEST is on the MATH key, two keys down from the 2ND key.

Texas... | Answered on Mar 29, 2014

I encountered this same problem with the TI-84. Turns out you have to put your P (Percentage) as out of one hundred. For example. With my problem I had;

Trails: 13
P: 53/100
X Value: L1 (List 1)

And then it posted my probabilities to the L2 list. For some reason if you just put 53, or whatever your percentage of success in, it won't calculate.

Texas... | Answered on Mar 12, 2014

Press the Mode button/key. Scroll down to the line Stat Wizards and highlight ON. Press ENTER. to validate the choice. Exit the Mode setting. Now Press the key sequence [2nd][VARS] (DISTR) to access the distributions. Scroll to find your distribution, select and press ENTER. You will have your entry screen.

Texas... | Answered on Mar 08, 2014

What's the determinant of the numbers in matrix A? A singular matrix is a matrix whose determinant is zero.

Texas... | Answered on Mar 06, 2014

Your calculator may or may not have a program for unit conversion, but the best method is to understand the metric system so you can do these conversions without a calculator. A meter is the same as 100 centimeters, so divide 11390 by 100 to get 113.90 m^3.

Rather than relying on a calculator, I highly recommend taking the time to practice metric conversions. It is very common for high school and even college professors to try and trick you by, for example, requesting the answer in centimeters when the question is in meters.

Texas... | Answered on Mar 02, 2014

To graph a sequence, you must set the Graph Mode to Seq.

On line Func, use the right arrow to highlight Seq. this way when you press the key X, T, Theta, n you enter the variable n

Make sure you turn off the StatPlots. Press [2nd][Y] (StatPlot), then select [4:PlotsOff]. See the screen capture.

Texas... | Answered on Feb 26, 2014

If you backed up the calculator, you may be able to restore lost data. Failing that, there is nothing you can do.

Texas... | Answered on Feb 17, 2014

Hi,

Thanks for using FixYa.

Texas... | Answered on Feb 14, 2014

Hello,
Press [STAT][5:SetUpEditor][ENTER]
The list will be restored (not the data)/
Hope it helps.

Texas... | Answered on Feb 08, 2014

The formula to find the volume of right prisms and right cylinders is
Volume=(area of base)*height
If the cylinder has a circular base, then the area of the base is PI*R^2
and the volume is Pi*(R^2)*H.
Here R is measure of the Radius, and H is the measure of the Height. R and H must be expressed in the same unit.

Texas... | Answered on Jan 26, 2014

x^2+13x+15=0
Recall (x+a)^2=x^2+2ax+a^2
Write x^2+2*(13/2)x+15, and compare the terms in x. a=13/2
x^2+13x+15=x^2+2(13/2)x+(13/2)^2-(13/2)^2+15
The first three terms are the expansion of (x+13/2)^2
You expression is equivalent to
(x+13/2)^2-[(13/2)^2-15]=(x+13/2)^2-[SQRT(109)/2]^2
Use the identity for the difference of two squares a^2-b^2=(a-b)(a+b)
This gives
x^2+13x+15=(x+13/2)^2-[SQRT(109)/2]^2=
[x+13/2 -SQRT(109)/2][x+13/2+SQRT(109)/2]
The polynomial can be written as (x-a)(x-b) (Note a has nothing to do with the one used above to complete the square. You can use any name for the roots, x_1, x_2, anything.
The two roots are on the screen captures below.

PS. I prefer to manipulate exact expressions with radicals. If you do not like it use the decimal approximations.

Texas... | Answered on Jan 19, 2014

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