What's happenin, plz help me this is due next class. I also really need an included explanation that shows all work. The person with the correct answer and thorough explanation will get brainliest. Thanks and stay perfect.

What happens to atoms and chemical bonds during a reaction?

What is the acceleration of a spaceship that is initially at rest and then speeds up to 220 m/s in 20 seconds

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.