Two brothers, mark and charles, each inherit $30000. mark invests his inheritance in a savings account with an annual return of 3.1%. while charles invests his inheritance in a cd paying 5.8% annual. how much more that mark does charles have after 1 year

Solution: Mark's initial amount

Mark invest's his inheritance amount in savings account with an annual interest of 3.1%. Therefore, the Mark's interest amount after 1 year is:

Therefore, total amount Mark will have after 1 year =$30930

Now Charles also has $30000 from his inheritance.

Charles invests his inheritance in a CD paying 5.8% annual.

Therefore, interest amount for Charles after 1 year is:

Therefore, total amount Charles will have after 1 year =$31740

Therefore, Charles will have $31740 - $30930 = $810 more than Mark

answer:

sometimes

*i think

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.