What is the greatest monomial factor of 15*^3y^2+45x^2y^2+30x^2y^3?

15y^2

Step-by-step explanation:

Look for the biggest number that goes into each of the three terms in the expression. Then look for each variable and its highest power that is in each of the three terms. Put it all together and that is the "greatest" (biggest) "monomial" (number and variables with no plus or minus) "factor" it goes into the each term of the given expression. See image.

828. all there is to it!

here, if you ever need with rounding (or other forms of arithmetic/math) again, use this:

thats the rounding one, but if you just click the top left, it shows you all the calculators you may need!

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.