If 5 people are in a room, i came in and killed 4! how many people remain in the room?

Technological solutions have good bad effects. what is one bad effect of spraying a chemical pesticide on crops

Winds are formed from the sun's uneven heating of the earth's atmosphere. the wind patterns are altered by bodies of water, different landforms, and plant cover. because of this, the wind is considered a form of

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