''There are cars, they pass like ghosts, unseen unremembered, there are people, whom we trust, always, when we are alone, when we are lost, when we are drunk. We never see their faces but everyday we dissapear into thier cars."
Who do we trust even if we dont know them....who passes unnoticed, wherever they go....who hunts in the middle of the crowd.
Excel in math and science
Master concepts by solving fun, challenging problems.
It's hard to learn from lectures and videos
Learn more effectively through short, conceptual quizzes.
Our wiki is made for math and science
Master advanced concepts through explanations,
examples, and problems from the community.
Used and loved by 4 million people
Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.
Your answer seems reasonable.
Find out if you're right!