Well, most active and passive basses when you don't use EQ are very similar. After all, the front end of your head is basically an active preamp! An active bass merely moves part of that EQ circuit into the bass where it more convenient to adjust while you are playing.
In the Common Application, it says that the Personal Essay should be at least 250 words, and attached on a separate sheet (presumably, if you're submitting it online, you attach a one-page file).
There are two possibilities: The first is to regard the blog post as an essay as a rough guide. The ideal blog post is 1,600 words (or roughly 7 minutes of reading time). That then gives 16 paragraphs (at 100 words each) to as many as 40 paragraphs (at 40 words each).*.