So today we had the state test that we have to take thanks to NCLB, for my sophomore class. It was Math. I practically finished all 62 questions in about an hour and a half. Except one question:
If I replicated it correctly from memory. Anyways, I spent like the whole day trying to figure out the answer and I just couldn't. I know I will feel like a douche when you guys tell me right answer. But I just kept on trying and trying with everything I could think of and nothing. So now my perfect score streak since 1st grade is broken.
After some cursing out loud and getting escorted to the gym to finish there, I gave up and randomly selected B.
you sure the correct answer is within those options? lol idk if im right cuz this is old stuff but the volume of a cilinder is the area of the circunference times the height. area of circunference = pi*radius^2, and height = h. so: r = x/2, h = 6x V = pi*(radius)^2*height V = pi*(x/2)^2*6x V = pi*(x^2/4)*6x V = (3/2)*pi*x^3
so the answer is E) none of the above. or F) this test sucks balls.
Last edited by evilpeta on Wed Apr 29, 2009 9:21 pm, edited 2 times in total.
evilpeta wrote:you sure the correct answer is within those options? lol idk if im right cuz this is old stuff but the volume of a cilinder is the area of the circunference times the height. area of circunference = pi*radius^2, and height = h. so: r = x/2, h = 6x V = pi*(radius)^2*height V = pi*(x/2)^2*6x V = pi*(x^2/4)*6x V = (3/2)*pi*x^3
so the answer is E) none of the above. or F) this test sucks balls.
evilpeta wrote:you sure the correct answer is within those options? lol idk if im right cuz this is old stuff but the volume of a cilinder is the area of the circunference times the height. area of circunference = pi*radius^2, and height = h. so: r = x/2, h = 6x V = pi*(radius)^2*height V = pi*(x/2)^2*6x V = pi*(x^2/4)*6x V = (3/2)*pi*x^3
so the answer is E) none of the above. or F) this test sucks balls.
you don't get to multiply 6 times 1/2 since the 1/2 turns into 1/4 due to radius squared. lets take X out of the equation so it's easier to see. radius = 1/2, height = 6 Volume = pi * (radius)^2 * height V = pi * (1/2)^2 * 6 V = pi * 1/4 * 6 V = pi * 3/2
now you can just assume it's x^3 since its a volume, volume is measured in units ^3 meters^3, etc etc.
evilpeta wrote:that is a common mistake, you're just squaring the X, and not the 1/2 before it.
my teacher use to yell at us for that, i learned if (1/2x)^2 then we square both but if 1/2x^2 then the x is only square. but probably since the ^2 is part of the area formula it is assumed that it should be written (1/2x)^2
Well poo.. I messed that up lol. I don't like combining the fraction with the x. Was trying to keep everything separated. Meant to have parenthesis around the fraction.. so walla, I threw in some more. Think it's fixed now.
wasn't talking to you. lol looking at the first picture the "1/2x" is rather confusing without parenthesis. any math teacher or judge will see that as 1 over 2x.
evilpeta wrote:wasn't talking to you. lol looking at the first picture the "1/2x" is rather confusing without parenthesis. any math teacher or judge will see that as 1 over 2x.
I thought the same as well. I was like, wtf, these choices aren't even CLOSE to the answer.
evilpeta wrote:you sure the correct answer is within those options? lol idk if im right cuz this is old stuff but the volume of a cilinder is the area of the circunference times the height. area of circunference = pi*radius^2, and height = h. so: r = x/2, h = 6x V = pi*(radius)^2*height V = pi*(x/2)^2*6x V = pi*(x^2/4)*6x V = (3/2)*pi*x^3
so the answer is E) none of the above. or F) this test sucks balls.
You are my new hero...
but isn't 6*1/2=3? or i'm i a math noob?
lol i have no idea ~_~ i dropped math a long time ago lol.__. whoever can do this kinda **** is my hero , D: im stuck at the first ;x
