Please awnser this for me

Arecent poll of 500 residents in a large town found that only 36% were in favor of a proposed referendum to build a new high school. find the margin of error for this poll if we want 95% confidence in our estimate of the percentage of residents in favor of this proposed referendum.

Growth of the business (be sure to use the terms “culture” and “cultural diffusion” in this section.) of debbie fields. plz me

What is douglass's purpose in the speech "the hypocrisy of american slavery, july 4, 1852" ? how does douglass reveal his purpose to the reader?