An epidemiologist wants to estimate the proportion of residents in her city that carry the hepatitis a virus. it is thought that the proportion is approximately 46%. how large a sample of residents should be taken to estimate the proportion who carry the hepatitis a virus to within 8 percentage points with 95% confidence?

Look, when you want to do something like put it like x^2. x2 could mean x² or x₂. so to clear confusion, know the notation. to find the product multiply the x's and you get -8x and the y's and you get 6y. since it's all being multiplied it is just -8x6y, or answer a. although the better answer is -48xy(combining -8 and 6) because you should multiply constants whenever you can.