In a survey of 850 students in a school, 90% reported having pets at home. If the margin of error is +3.4%, what is the interval that is likely to contain the exact percent of all people who have pets at home?

Can somebody me out with this question

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m