<p>The problem with the TI-89 is that it’s banned in so many places it’s really not worth it. A TI-84 has enough features, is cheaper, and is allowed everywhere a graphing calculator is allowed.</p>
<p>The problem with the TI-89 is that it’s banned in so many places it’s really not worth it. A TI-84 has enough features, is cheaper, and is allowed everywhere a graphing calculator is allowed.</p>