daily use words

Plastic is used for making a large variety of articles of daily use and these articles are very attractive. But it is advised to avoid the use of plastic as far as possible. Why?

A basic salt that is used in daily life is

The carbon compound is used in daily life is ………….. .

Consider the following distribution of daily wages of 50 workers of a factory.Find the mean daily wages of the workers of the factor } - by using an apropriate method.