1. In the data set, the sum of all the data points, divided by the number of data points; the average. 2. To find the mean, you add up all the data, and then divide by the number of data.
Steel: 4. provided a tough, efficient building material for industrial purposes
Eli Whitney: 2. developed system of interchangeable parts; increased population
Assembly Line: 3. made putting together of goods piece by piece; increased production greatly
Steam Power: 1. enabled building of factory away from rivers; powered machines
I have been to China and have been to the great wall and etc. SO i am a expert so ya
The correct answer is <em>A) Southern states created loopholes to prevent African Americans from voting.</em>