How do you do rate problems 2?
starting at home, jessica traveled uphill to the toy store for 121212 minutes at just 101010 mph. she then traveled back home along the same path downhill at a speed of 303030 mph. what is her average speed for the entire trip from home to the toy store and back?

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.

what is the approximate angle of acb if abc is 25cm and the length of segment bc is 15

step-by-step explanation: