How do you do this and show me the scratch work on how you got it.

Well I answered it

Step-by-step explanation:

So first thing you are going to do is add, so we are going to use PEMDAS

add the 5+4 and you get 9 then we're going to take that 7 and add the 9 and 7 so that gives us 16 now the 11² so that means we are doing 11 two times i think so then 11 times 2 is 22 take that 16 and subtract so 22 take away 16 is 5 now idk what to do with the (4) and (3) at the bottom i hope this helped and i think this is what you have to do if not please tell me what grade this is so i know

it costs $20 to interview each person for a survey. find the cost to obtain a +- 3% margin of error.

step-by-step explanation:

copy and paste, put it in google