Coal powered cause air polution
Answer:
Design A average is 18.666 and Design B average is 32.
Explanation:
Add each of the trial numbers for each design. Divide those numbers by 3 for each design to get 18.666 for Design A and 32 for Design B.
Answer:
If your just looking for a description here you go.
Explanation:
Most spiral galaxies contain a central bulge surrounded by a flat, rotating disk of stars. The bulge in the center is made up of older, dimmer stars, and is thought to contain a supermassive black hole. Approximately two-thirds of spiral galaxies also contain a bar structure through their center, as does the Milky Way.
Hope this helps.
