A cognitive psychologist enrolls undergraduate students for a computer-based study about the effect of mood on problem-solving behaviors.

Late at night some traffic signals change patterns and become ?

Factor out the greatest common factor. minus − 14 14p3 plus + 10 10p2 plus + 4 4p

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.