It’s Halloween night and you’re meeting your friends on your bikes at the haunted house, but you want to get there first to scare them. They’re 1 mile from the haunted house; they leave 1 minute before you, and they pedal 5 miles per hour. How fast will you have to pedal if you’re 2 1/2 miles from the haunted house, and want to get there 1 minute before them to hide?

15 miles per hour

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.

answer: its the third option.

step-by-step explanation:

i just took the test.