Really need help on this problem. If anyone would like help me they are welcome to.

How did planetesmals form planets? a. they broke apart into smaller chunks. b. they collided and stuck together. c. they cooled and pulled ice together. d. they began to rotate.

Atrain travels 74 kilometers in 3 hours, and then 81 kilometers in 5 hours. what is its average speed?

Chemical kinetics what was the rate of reaction in trial 3? choose the closest answer.