On a number line, will the square root of 20 be closer to 4.4 or 4.5

4.5

Step-by-step explanation:

Nearest of square root of 20

To choose closer from two numbers 4.4 or 4.5

First we find the square of both number.

Square of 4.4

Square of 4.5

Now compare the closer number from 20

Difference of,  20.25 - 20 = 0.25

Difference of, 20-19.36 = 0.64

As we know, 0.25<0.64

Hence, On number line square root closer to 4.5

what are the things "represented below"?

step-by-step explanation:

nobody can if you dont give the choices

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.