What is the proper scientific "E" notation when writing $2.24 x 10^4$ ?

Question

4433 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2015-03-30T01:08:34

Basically "E" simply replaces " $xx10$ ^" in the standard scientific notation.
So,
$2.24xx10^4$ would be written as $2.24E4$ or sometimes $2.24E+4$

What is the proper scientific "E" notation when writing 2.24 x 10^42.24 x 10^4?