Report, edit, etc...Posted by MillenniumArmy on 2006-10-25 at 22:06:20
Some weeks ago I took a calculus quiz and it turned out that I was the only one, out of 70+ students that got it right (it was only one question). I didn't get my quiz back yet, but I got my answer due to a careless mistake (I realized this after taking in the quiz).
So anyways here the problem:
The answer I put on my quiz was -3.2/8 or -0.4 meters per second but I think I meant to put -0.6 (and that's what pretty much everyone else got). So I got the answer right, but I don't think I know how you'd get that answer because I think got my answer because of a careless mistake (in my work, meant to multiply 1.6 by 3, but instead i multiplied it by 2).
So can someone show me their work on this problem?
EDIT: Nvm i figured it out
>>R.I.P.
So anyways here the problem:
QUOTE
A spotlight on the ground shines on a wall 12 meters away. If a man 2 m tall walks from the spotlight toward the building at a speed of 1.6 meters per second, how fast is the length of his shadow on the building decreasing when he is 4 m from the building?
The answer I put on my quiz was -3.2/8 or -0.4 meters per second but I think I meant to put -0.6 (and that's what pretty much everyone else got). So I got the answer right, but I don't think I know how you'd get that answer because I think got my answer because of a careless mistake (in my work, meant to multiply 1.6 by 3, but instead i multiplied it by 2).
So can someone show me their work on this problem?
EDIT: Nvm i figured it out
>>R.I.P.