3. Tom travelled 70 km at a speed of 40 km/hour on the first part oh his journey. a - Find the time taken for the first part of his journey

He travelled the second part of his journey at a speed of 52 km/hour for 1 hour 15 minutes.

b - Find the distance travelled in the second part of his journey

c - Find the average speed for the whole journey

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 is : muchas/tipicas

have a nice day!

~recklesschicken

7.3

step-by-step explanation: