<p>ya im kinda confused w/ this problem ... wudnt it be 128 b.cc</p>
<p>in 12 yrs theres 144 months
144/18 = 8 meaning that a number is doubled 8 times</p>
<p>lets say 2 is the initial number ... 2<em>2</em>2<em>2</em>2<em>2</em>2*2 = 256</p>
<p>then 256/2- - 128 ... dont you divide it b/c it says how many times the original number is the number of computer chips after 12 yrs .. 2*128 =256</p>
<p>dude it is 256. Think. Assume you start with two. 12 years=144 months. doubles every 18 months. therefore it doubles 8 times. I hope you still follow me.
2<em>2=1st double
2</em>2*2=second double
2^4=third double
2^5=fourth
2^6=fifth
2^7=sixth
2^8=seventh
2^9=EIGHTH DOUBLE
Therefore, 2^9 is 512 and that is what you are left with. Now it asks how many times larger so 512/2=256.</p>
<p>And for the book one, the answer was 185, not 195. I think you may have gotten some of the numbers mixed up. i remember checking and i being 185</p>
<p>also, books should be 185. it doesnt matter that they said exactly. 15 people had exactly two. 5 people had exactly three. Therefore, we know that there were 160 people? i think. Therefore, if we do 160-15-5, we get the number of people who got exactly one. that means 140 people got one book. now we know that 15 people got exactly two. therefore, these people purchased exactly 30 books. we also know that 5 people got exactly 3. therefore, these people got exactly 15 books. 140+30+15=185</p>
<p>no man...do it by hand and just write it...youre doing it wrong. ok yes it doubles 8 times....start with 2, double it and get 4, again you get 8, then 16, then 32, then 64, then 128, then double that and you get 256. its always safe to do it by hand...then you divide 256 by 2....try it...theres no way thats wrong because i just doubled everything eight times</p>
<p>exactly sheena</p>
<p>yes the 2*2 is the first double...but your original is 2 not 4...you start out with the original number of 2 therefore you stop at 256 as the eighth term</p>
<p>griffon, you've only doubled it 7 times. count it. your logic goes as the following:</p>
<p>2 original amount
4 1st double
8 2nd double
16 3rd double
32 4th double
64 5th double
128 6th double
256 7th double</p>
<p>you stopped at the 7th. if you were to go an 8th time, it'd be 512, and 512/2 is 256, or just 2^8.</p>
<p>Griffon, you only doubled '2' 7 times, as opposed to 8. That is why you come up with 128. </p>
<p>Let's start with 2.</p>
<p>Double once: 4
Twice: 8
Three times: 16
Four times: 32
Five times: 64
Six times: 128
Seven times: 256
Eight times: 512</p>
<p>512/2=256.</p>
<p>By the way, I created an account for the sole purpose of writing to you. I was getting rather irritated that no one pointed out your mistake to you earlier. :P</p>
<p>yeah **** i just saw that</p>
<p>lol, silvykins, nice post.
I just made an account to point out this mistake and to tell the people in the CR that the word was most definitely unaffected and not disaffected.</p>
<p>alright...that sucks a lot...anyone have a guess as to a math score with 1 wrong and 2 omit</p>
<p>It's ok, man. I'm sure you did fine on the rest of the section.</p>
<p>I dunno if this helps anyone, but I got .4, an 8, another 8, and a 9.75 for a couple of the grid-ins. I forget the actual questions though, so I guess that doesn't help much.</p>
<p>Also, for the weird triangle with answers 8 and 9, it was 8. A line tangent to a circle will make a right triangle with the radius so just apply Pythagorean and you get x^2+36=100 so x=8. :D</p>
<p>lol, silvykins, nice post.
I just made an account to point out this mistake and to tell the people in the CR that the word was most definitely unaffected and not disaffected.</p>
<p>xDDDDD Guess I was a little late there, huh? Anyhow, I don't remember that CR question at all. Maybe it was experimental? What passage was it from? </p>
<p>Griffon, if you get no other questions wrong, you should expect a high to mid 700s. If you get more wrong then...maybe low 700s. A lot wrong and you're in the 600s.</p>
<p>There was a question with 13.5 does anyone remember it?</p>
<p>did anyone get 13 1/3 for an answer and .36 for another</p>
<p>I did get 13 1/3 for the average manuscript-writing rate one. That one wasn't a grid-in, though.</p>
<p>I don't recall whether I got a .36 or not.</p>
<p>13 1/3 was a manuscript one MC question, and .36 or 9/25 was a grid-in</p>
<p>alright....and everyone says that they got two 8's in the grid in...i think i might have gotten 3...i dont really remember though</p>
<p>do u mind explaining the manuscript one to me? i got an answer but i just averaged the two rates (even though that seemed WAY too easy)</p>
<p>i also had two 8s for answers and 9/25 for one of them</p>
<p>Layered_cake, to find average rate, just do (total pages)/(total time). </p>
<p>Suppose the whole manuscript was 100 pages. She typed at 10 pages/day for the first half so it took her 5 days to type 50 pages (half of 100). Then she typed the second half at 20 pages/day. So it took her 2.5 days to type 50 pages.</p>
<p>100 pages/(2.5+5 days)=13 1/3</p>