The Hitchhiker's Guide to PHP Math Functions

Hi I’m having a bit of struggle comprehending the actual usage of some of the PHP built-in functions at this assignment and I see there isn’t a youtube tutorial walkthrough so Im kind of stuck. Starting from the first question.

Could you give some examples of the PHP built-in functions that you don’t understand ?

Also the php documentation is like a bible. It talks a lot about what these functions do and how to use them.

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