Does neigbors have a apostrophe

Compare the excerpt you read from the introduction of great astronomers to the article you read about gis. what differences in purpose and tone do you notice?

Which function is positive for the entire interval (-3, -2]?

Read the paragraph. in fact, teenagers contribute a great deal to their community. this is another reason why they must be taken into account when public policy is debated. over eighty percent of teens spend time volunteering at their schools and other organizations. this is an example of statistical analysis layering point of view outlining