I see an error in all the labels, where you close them:
<td align="right"><label for="name">Full Name/label></td>
Missing that < bracket means your labels never close.
As far as screen readers are concerned, at least the ones with a virtual buffer (JAWS, NVDA, Window-Eyes on Windows), the table doesn't matter: once you're in a form, you're in Forms Mode and all the table elements are ignored, unless you deliberately take yourself OUT of Forms Mode to hear everything (but that means your keystrokes are for navigation and won't fill in the inputs).
If you use alt text for the image, it kinda defeats the purpose of the image (if you were using an image so bots couldn't see the question). So I'd just have it be a regular label instead. If you insist on an image, then yes, use alt text.
The good news is, most of the bots wandering around out there don't have built-in math capabilities to answer those questions, even though it would be super easy for anyone to add. You also get the possibility of making things a bit harder for the cognitively impaired, like people with (I kid you not) dyscalulia. I like honeypots a bit more for this reason.