Question about Texas Instruments TI-89 Calculator

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I have a calculator ad or something that is hiding my emails I need it off and can't remove please help

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Please go to control panel, programs and packages. Next check for the software which is responsible for hiding the emails. Unisntall it to get back full control over your emails.

If you are are not sure which one is it then go for a system restore and that would also remove the changes that you made.


Posted on Apr 28, 2010


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Check your owner's manual. Ok, ok I know you lost it, but you can download one from Canon. Is it possible you are exceeding the capacity of the machine? Is it possible you are low on ink?

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How to get rid of ads on my screen when I go to my in box in Yayoo mail

You can either temporarily hide the ads that keep popping up on your Yahoo Mail page or block them permanently. To know how, refer to the steps below.

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How to remove the ad at the top of yahoo mail

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My screen turns on but when you do anything it has random numbers, line and letters on it and i need to get it fixed immediatley

I've had this issue before with my TI-83 Plus. I'm not sure exactly the solution I used, but these steps progress through the mildest to most extreme methods of fixing the calculator.

Solution 1: Take the batteries out.

Odds are you've tried this already, but it bears mentioning.

With the calculator on, remove the triple A batteries housed in the back. After a few seconds, replace them and turn the calculator on.

Solution 2: Clear the RAM.

Remove one of the AAA batteries. Press and hold the [CLEAR] key. While holding [CLEAR], reinsert the AAA battery and then turn the calculator on. The calculator should display the message "RAM Cleared". Release the [CLEAR] key and then press it one more time to remove the message.

Solution 3: Reinstall the operating system

Remove one of the AAA batteries. Press and hold the [DEL] key. While holding [DEL], reinsert the AAA battery and then turn the calculator on. The calculator should display "Waiting...Please install calculator software now"

Here is the website to reinstall your OS. First you'll need the TI-Connect software.

Solution 4: Remove all sources of power. This is a risky move, but if your calculator will absolutely not work after you try even reinstalling the operating system, it might be your last hope.

Remove all of the batteries including the round lithium battery for 5 minutes. After the 5 minute period, reinsert all of the batteries and turn the calculator on. Adjust the contrast if necessary.

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How do u remove add-in applications, i added something, and it cant delete

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Hope it helps.

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Ok, if your trying to do something like this: 2+2=4 then make it continue adding by 2's (6,8,10...)
What you do is after you type 2+2 and press enter, you need to press the "+" and u should see it show this "ans+" then type 2. Then this should continue adding by 2's. Hope this helped.

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Average handle time

I have created a spreadsheet for you to a) use and b) to learn from.

It is an Automated spreadsheet (as they should be) which calculates the number of minutes in a working week or month and calculates the average time per email giving Daily, Weekly and Monthly Outputs. It takes into account Public Holidays (or for time off). You can use the Output to create Graphs etc to visually display the Output.

It also allows you to calculate a Part Month average.

I have displayed it as it was CONSTRUCTED and as it would be USED.

The As Used worksheet is Protected and the only Inputs that can be done are in the Green Boxes (also the Saturday and Sunday boxes but you will need to Unhide the Validation List to include these and then to add 2 more columns titled Is Saturday? and Is Sunday? with the appropriate If Statement.

To unprotect the sheet go to Tools - Protection - Unprotect. There is no password so leave this blank.

All the workings are still there, the columns are just Hidden. To Unhide them, highlight the columns to the left and right of the hidden columns, click on Format - Columns - Unhide. To hide them again, highlight the columns that you want hidden, click on Format - Columns - Hide.

The LOGIC used (as in Functions) may seem complex but if you read the Descriptions in the first row you should be able to work out what and why it was done that way. Click on a cell to see what Function was used where.

You said that your spreadsheet was becoming a real mess, well I have created a monster for you (but not a mess).

I have uploaded the file to here:

Hope this gives you the push to really start using Excel.

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