Samuel has a collection of toy cars. his favorites are the 27 red ones which make up 60%, percent of his collection. how many toy cars does samuel have?

Afish fossil is found in a rock. a foot bone and tooth are found in an older layer of the same rock. what can scientists learn from the rock? a) the area changed from land to water. b) the area changed from water to land. c) the area has always been land. d) the area was once an ocean.