21. The period from 1865 to 1920 was one of inventions in the United States. Name one invention in communications and one in transportation from this period that had an important impact on the lives of Americans. Explain how each invention affected people's lives.

Asocial scientist is interested in determining if there is a significant difference in the proportion of republicans between two areas of town. he takes independent random samples of 200 families in each area of town and a significance test was conducted. the p-value was 0.0156. what should be our conclusions?

Which type of market produces the highest level of output at the lowest price to consumers?

Section 1: this section deals with the possible implications (consequences) of sexual activity or abstinence for a teenager. 1. being sexually active can impact teenagers emotionally. in a complete paragraph, discuss one emotional impact of sexual activity. remember to refer to facts you’ve learned to answer the question. (10 points) 2. choices we make affect our health. in a complete paragraph, discuss a possible health consequence for sexually active teens. remember to refer to facts you’ve learned to answer the question. (10 points) 3. throughout this course, we have discussed goal setting. in a complete paragraph, discuss how sexual involvement can change or potentially influence a teen’s goals? (15 points) 4. in a complete paragraph, explain how your value system impacts your choices about abstinence versus sexual activity. (15 points)