Can someone answer 21? i have no clue and have a test tomorrow

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?

Most democratic have a government with three branches : executive, legislative and judicial. in canada, the legislative branch is the

What is the largest room in the white house