You wish to estimate,with 99% confidence, the proportion of Canadian drivers who want the speed limit raised to 130 kph. Your estimate must be accurate to within 5%. How many drivers must you survey,if your initial estimate of the proportion is 0.60?

I know that 99% is 2.575 but i dont know how to set up the problem. I don't think that 130 kph even has anything to do with the problem. I think i am over thinking this question.

I know that 99% is 2.575 but i dont know how to set up the problem. I don't think that 130 kph even has anything to do with the problem. I think i am over thinking this question.