When explaining chemical reactions to a friend, brianna models a reaction by combining ingredients to make a cake. Which type of chemical reaction is brianna most likely explaining? synthesis decomposition polymerization replacement.

Which statements about the two fossil images are correct? 1. cave bears are ancestors of plateosaurus. 2. plateosaurus were present on earth before ostracoderms. 3. ostracoderms were the first to die. 4. plateosaurus died after the ostracoderms. 5. cave bears are the oldest fossils.

Abox contains 40 number tiles numbered 1 to 40. if a tile is drawn at random, what is the probability that the number drawn is a multiple of 3 or 4? find p(multiple of 4 or multiple of 5)

What is the meaning of the prefix un-? a. over b. above c. under d. not