The term 'many a', followed by a singular noun or noun phrase, is a rather literary alternative to 'many' followed by a plural noun or noun phrase. For example:
'I saw many an unfortunate family during my travels in Outerstan.'
In The Merchant of Venice, Shakespeare wrote 'Many a time and oft in the Rialto you have rated me ...'
There is a saying 'Many a mickle makes a muckle', which is supposed to mean 'Many small things added together make a large thing.' (In fact it doesn't mean that, since the words 'mickle' and 'muckle' both mean 'a large thing'. It should be 'Many a pickle [or puckle] makes a mickle [or muckle]'.)
There is no record of how many people use it.
You use "how many" when you are referring to a quantity. Example: How many times do I have to tell you?, How many eggs are in that basket?
they use as many as they need to process it they also use the 1 and 0
It depends on what you think is "many people", but generally, many people do use it.
many people use it a day buckethead!
How many chocs do you use
How many players or athletes use steriods. How many players or athletes use steriods.
There are no studies on this, but many people do use online homework.
It is not possible to answer that question with any precision. Many organizations all over the world use spreadsheets; probably as many organizations as there are that use paper.
They did not use many
Through the use of technology
Many many people use youtube but they just use it to lie about their age and other things like that