In which two spanish colonies did the major battles of the spanish american war take place

Some european explorers sailed west looking for the passage to india

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.

Which statement about spreading knowledge of diseases and health around the world is correct?