Jenna has 8 pairs of jeans. Three of them are blue. Jenna bought two more pairs of jeans. If both of them are blue, what percentage of her jeans is blue now? If both of them are not blue, what percentage of her jeans is blue now?

62.5%

Step-by-step explanation:You do 5/8 and then divide it and you will get a decimal and move the number 0.625 back to the tens which will get you 6.25%

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.

the surface area is 124cm²

step-by-step explanation:

length: 4cm

width: 9cm

height:   2cm