8. What was Carnegie's great breakthrough when it came to the manufacture of steel? a. He used the Bessemer process to make it fast and cheap.
b. He discovered how to use metals native to America to make it.
c. He realized that efficient production required electricity.
d. He installed kerosene lighting so his factories could operate 24/7.

This question is based on the following paragraph. tomas tiptoed across the room. he made sure not to walk on the spot that always creaked. he opened the squeaky door as slowly as possible. he took one last look in the crib and smiled. was anything more beautiful than a sleeping baby? softly he closed the nursery door and headed down the hall. it had been a long night. what can you infer from this paragraph? a. tomas was ready to start a new day. b. tomas's house needed some repairs. c. tomas had spent a long time getting his child to sleep. d. tomas did not enjoy being a father.

Why do drivers have difficulty seeing side traffic at t-intersections in rural areas?

97 points what types of changes have been made in the united states to protect people from earthquakes? a. communities are no longer located along fault lines. b. building codes ensure that structures can withstand shaking. c. warnings go off when an earthquake is expected, and people evacuate the area. d. barriers have been built to prevent flooding by a tsunami.