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You are


I'm a letter.

E is a letter

I am found in an elephant

E is in the word elephant

and oh! I am heard too, by a person sense of hearing!


Sometimes, I am also used in a cartesian plane, or maybe used as a word to describe things are growing really.. really fast.. unless I am negative :/.

Euler's number is used to approximate limits

I am a letter, but found commonly in letters!

E is the most commonly used letter in the English language

And I am also sometimes commonly known as a latter (In English).


Beat that! I'm in between the lines of music that have a very troublesome chef.... just below the highest "seen" staff.

In bass clef, the note "e" is inside the staff.

Look at that buns I just made! (I know it's bad)


I'm used in banks after I was discovered by approaching to a limit. I mean, I was discovered to have numeric use.


A child uses me when in digust (sometimes).


Oh... I'm so rational... NOT.

e, as in euler's number, is irrational