How many milliliters of 0.30% sugar solution must you add to 75ml of 4% sugar solution to get a 0.50% sugar solution?

We need to add 1312.5 mililiters.

Step-by-step explanation:

We have a solution of 75ml of 4% of sugar, and we want to know hoy many mililites of 0.30 sugar solution we need to add if we want to get to a solution of 0.50%.

First, we if we add X mililiters of the second solution, we have that the total number of mililiters is:

X + 75 = M

and we also have that for the mixture we need to have that the percentage of sugar in both components corresponds to:

(X*0.003 + 75*0.04) = M*0.005

where i written the percentages as decimals.

now we can write this as:

(X*0.003 + 75*0.04) = (X + 75)*0.005

now we can solve this for X.

(75*0.04 - 75*0.005) = X*0.005 - X*0.003 = X*0.002

2.625 = X*0.002

X = 2.626/0.002 = 1312.5 mililiters.

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.

do i do it on a graph?

step-by-step explanation: