Used , tested and working., with case. The Texas Instruments TI-89 Titanium Graphing Calculator is a reliable tool for solving mathematical equations and analyzing graph functions. With its gray and black color scheme, this calculator is easy to use and navigate. Powered by batteries, it is convenient for on-the-go use in various fields such as science, engineering, and business. The regular size display and model of Texas Instruments TI-89 make it a versatile option for those seeking a dependable graphing calculator.
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