How can I split a 90 minute track into two so that I can save the two tracks separately and consequently, be able to burn each track on its own separate cd? I tried cutting half the track and pasting it into a new audio file (in a new Audacity folder) but for some reason it plays like a 33 rpm record set at 78 rpm (way too fast). Any help in solving this would be apprciated. Thanks. 
There’s a tutorial here:
http://manual.audacityteam.org/index.php?title=Tutorial_-_Copying_tapes%2C_LPs_or_minidiscs_to_CD#Recording.2C_editing_and_exporting
But it’s a bit out of date (when it finally gets down to making separate tracks for each song the example images are from 1.2).
Assuming you have Audacity version 1.3.x …
Open your original, uncut project.
Find the spot where you want to cut the track and click there with the edit tool.
Click on Edit > Split. You have now created two “clips” in the one track.
Double-click in the first clip.
Click on Tracks > Add label at selection. A label track is created and a blank label spanning the first clip is created.
Type in the label box to name the clip.
Repeat for the second clip.
Have a look at this thread https://forum.audacityteam.org/t/how-to-seperate-one-large-track-in-to-seperate-tracks/10489/1
Scroll down to the fourth post for a picture of what you project should look like at this point.
Click on File > Export Multiple
In the Export Multiple dialog:
- Export Format: WAV (for Windows) or AIFF (for Mac)
- Export Location: click the Choose button and pick the spot where you want to save the files
- Split files based on:
– Labels - Name files
– Based on Label/Track name - click Export
The “Metadata Editor” may pop up twice - just OK it and let the export proceed.
You should now have two 16-bit 44.1 kHz PCM audio files ready to burn to CD.
The problem you describe with the audio playing back too fast means that the sample rate of the project that you imported the file into did not match the sample rate of the file.
If your goal is to create audio files to burn to CD you want to set Audacity’s default sample rate to 44,100 and leave it there, and always export at that rate.
– Bill