You mean decompose -- Plastic decompose in a long period of time depending on the type of plastic and the environmental condition to which it is exposed.
All products made up of plastic take very long time to decompose, reaching thousands of years.
About a week
It does rot as per me. I have never seen a plastic gets rot
About 400 years
500 years
about 15,000,000 years
420 years ,
More then your moms face
It very depends on what type of plastic. Normally it taks hundreds to thousands years.and somtimes forever.
The plastic bag will not decompose but it may clog up the toilet.
1 year
1 Million years