A truck is moving at a fixed speed. a
If the truck makes 30 miles in 25 minutes, find the time it will need to cover 25 miles

x =20.83333333 minutes

x = 20 5/6 minutes

Step-by-step explanation:

We can use a ratio to solve

30 miles         25 miles

 =

25 minutes      x minutes

Using cross products

30 * x = 25*25

30x =625

Divide each side by 30

30x/30 = 625/30

x =20.83333333 minutes

x = 20 5/6 minutes

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.