Find the area of the ligure. Round to the nearest tenth if necessary. 20 yd A. 160 yd B. 360 yd C. 180 yd? D. 130 yd?​

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.

b, i believe, but not sure.

answer: 270

step-by-step explanation:

you have to times 200 by 1.35 to get your answer

d.) yes, because the volume of the cone is greater than the volume of the sphere

step-by-step explanation: