You are curious of what the hell are the numbers such as 7.7E+9, or 3.2E-6?
You are at the right place!
That math tutorial will explain you all you need to know about the so-called Exponential Notation, also called Scientific Notation? that you may see on your calculator, or use in computers programs.
You will know haw to read them, and what they tell you about the orders of magnitude, in relation with the powers of 10.
This is done with a rigorous mathematical formalism, though from a practical point of view, with many numerical examples.
On this page of the site you can watch the video online Math Tutorial: Exponential Notation for the Floating Real Numbers Variables. with a duration of hours minute second in good quality, which was uploaded by the user The Practical Mathematics Channel of Mathedu 17 April 2020, share the link with friends and acquaintances, this video has already been watched 37 times on youtube and it was liked by 1 viewers. Enjoy your viewing!