<p>You can't use both at the same time. And that's kind of pointless anyways, use one or the other. If you've never used the TI 89 before, don't use it.</p>
<p>then can i bring one scientific and one graphing?? it is because i just learned the way to use the graphing calculator and still find it awkward to do other calculations apart from drawing the graphs.</p>
<p>I don't believe you can although I personally know of people who brought two calculators because 1 calculator didn't have enough RAM to store all the programs they wanted.</p>