Help please. It’s a quiz so if it’s wrong you will be reported

The arizona department of transportation wishes to survey state residents to determine what proportion of the population would like to increase statewide highway speed to 75 from 65 mph. at least how many residents do they need to survey if they want to be at least 99% confident that the sample proportion is within 0.09 of the true proportion?

Who is the current chief justice of the united states?

The following force measurements were taken during actual testing of the lever pictured. what is the ama of this lever?