Regarding your question about the Texas Instruments TI-89 Titanium Advanced Graphing Calculator: No, the ACT specifically forbids all Texas Instruments calculator models starting with "TI-89" and "TI-92". If you have any additional questions, please do not hesitate to contact MyTGTtech at 877-698-4883 every day, between 7am-11pm CST... The TI-84 is not as confusing as the TI-89, and it is cheaper. In general I would recommend Texas Instruments for you calculator even if you decide to get a different version because TI's are reliable. It is a little expensive, but well worth your money.
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