Mary has 20 pints of green paint. She uses 2/5 of it to paint a landscape and 3/10 of it while painting a clover. She decides that for her next painting. She will need 14 pints of green paint. How much more paint will she buy?

The answer to your question is 8 pints

Step-by-step explanation:

Data

Initial amount of paint = 20 pints

She uses, 2/5 and 3/10

Later she will use 14 pints, paint needed?

Process

1.- Calculate the paint left after have used 2/5

          20 x 2/5 = 40/5 = 8    She used 8 pints

           20 - 8 = 12 pints left

2.- Calculate the paint left after have used 3/10

           20 x 3/10 = 60/10 = 6  She used 6 pints

3.- Calculate the paint left

          20 - 8 - 6

          20 - 14

          6 pints

4.- Calculate the paint needed

          14 - 6 = 8 pints

She needs to buy 8 pints of paint

step-by-step explanation: yes

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.