12 people are waiting at a subway stop to get on the train. however, the train only has space for 9 people to board. how many different combinations of people can get on the train?

Which scenario describes intraspecific, indirect competition? a. a peacock defends its territory against another peacock. b. lions and hyenas compete for the same prey animals. c. a male black bear eats fish in an area of a lake, so other black bears can’t. d. different species of birds fight over spilled popcorn on the ground.

Emmanuel has had a sharps exposure at work and has reported the incident, his employer has offered him an immediate confidential medical evaluation and follow-up care. what can he expect from the exam?

D/dx(1+x^4+x^6/x^2+x+1) a)2x-1 b)2x+1 c)2 d)0