Karim sent a chain email to 10 of his friends. the number of people who got the email increases by a factor of 1.4 every week. write an expression that best represents the number of people who got the email after three weeks.

or

Step-by-step explanation:

Given: The initial number of friends got mail = 10

Then, The number of people who got the email increases by a factor of 1.4 every week.

It implies there is an exponential increase in the number of people with multiplicative rate of 1.4 every week.

Then the number of people who got the email after x weeks is given by:-

, where x is the number of weeks.

Now, the number of people who got the email after 3 weeks is given by:-

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.

l.jnl.j/n.m,lm,

step-by-step explanation: