Select all the expressions that correctly calculate the perimeter of the shape. Group of answer choices LaTeX: 300+100\pi 300 + 100 π 300 + 100 π 300 + 100 π 300 + 100 π LaTeX: 120+20\pi 120 + 20 π 120 + 20 π 120 + 20 π 120 + 20 π LaTeX: 10+10+10\pi+10+10+10\pi 10 + 10 + 10 π + 10 + 10 + 10 π 10 + 10 + 10 π + 10 + 10 + 10 π 10 + 10 + 10 π + 10 + 10 + 10 π 10 + 10 + 10 π + 10 + 10 + 10 π LaTeX: 80+20\pi 80 + 20 π 80 + 20 π 80 + 20 π 80 + 20 π LaTeX: 40+20\pi 40 + 20 π 40 + 20 π 40 + 20 π 40 + 20 π

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.

the answer to the expression is 83

the answer to question 1 is -8, 28.

step-by-step explanation:

step-by-step explanation:

a child is 12 years old, and his father is 32 years older. in how many years will the age of the father be 2 times the age of the child?

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this needs to be the answer format, or else your answer is incomplete.

if the number of years is x, then the equation is

in __ years