Lena found the greatest common factor (gcf) of 24ab2c3 and 30a2b3c2 to be 6abc2 by using these steps:
step 1: gcf of 24 and 30 is 6
step 2: highest shared power between a and a2 is a
step 3: highest shared power between b2 and b3 is b
step 4: highest shared power between c3 and c2 is c2
in which step did lena make a mistake?
a) step 1
b) step 2
c) step 3
d) step 4
e) lena's work is correct.

mark branliest

step-by-step explanation:

.6 is 1/2 of 12

the answer is actually d. i just took the test

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.

n=1.75+1.75

step-by-step explanation:

3.5/2=1.75