3.There is a circular water fountain of Diameter 12m.The wall of the tank has a width of 2m. If the thickness of the fountain is0.06m, what is the volume of the concrete used in constructing the tank?
% Y# K' c' u5 o+ YAns: 1.68 pie5 _8 h0 e7 e2 n2 m/ R

+ q4 C- S/ r# u我做出来是12*2*0.06*pie=1.44 pie，，咋弄出来的？。。。/ K/ u6 B) p* m5 m
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8. A label of vertical width w is stick on acylinderical vessel with area A(some number) and height 10 cm.- n; L% [! Y: S3 ]. A
Cola: w* ^; I6 H8 i, K7 R4 T( ]
Colb: 4.5- o5 z- ^' c# r$ n. N6 i
Ans: D* i5 m4 v8 s% g& V) D: ~7 T( q* ?
0 u- U0 X' n- g- O2 h1 V! ~; b
10.There was a $25 discount on every purchase of $75there was a 10% charge on shipping which was added before the discount and 20% sales tax after the discount was added. If john paid total $300, whatwas the original amount of purchase if no sales tax was added per $75
0 O$ g- k' K# \1 \# Q, ^- U9 `: {Ans : 240.1 o4 I$ F6 |. c/ `7 y8 X
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这道题没看明白，是说算原始价格吗？还是只算不加税的咩？5 a) ?( o, ]6 M# @- t9 y
如果只算不加税的，也应该是 300/（1+20%）=250...+ `( W) E& R9 D4 U9 T; {. |2 w

7 z* w& e: m- y2 r  }& C3.The area of rectangular region R is equal to thearea of rectangular region T.
$ q5 ^' N& j1 k. ?/ bThe Ratio of the length to the width of R is 3 to 1.
2 p, m8 B4 |7 k8 x4 ^5 N% C4 Rthe length & width of T are 12 & W, respectively.
* ]8 G1 S+ q6 d2 ]4 gCol A : w
4 {& t2 \' O  _, k: g+ ZCol B : 4, |' E! [: F- k8 {
Ans: C ; @9 D1 A5 w3 n8 |

! E; X- v& o! u8 p两个只是面积相等，有没有相似，凭啥w就等于4了。。。
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8. Given Principal amount P,rate of interest was r,and the amount increase from 1990 to 1995 and 1995 to 2000 each time by r%. sothe total amount was (7/5)p at the end of 2 yrs ." f3 r- y9 @/ d
Col A : r
" c0 k2 v5 V1 P# J' M2 _Cola B: 20; L  s4 L' J$ Q( d! L' Q
) l7 t- Q8 M5 z1 Z( Z0 z; ~* F; ^
这个没答案，是B吗？。。。两次都增长20%，会大于7/5，故r应该小雨20。。。
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2 l% j0 s: g/ M$ l3 ]4 _8 z8 }- p1. What is the least possible product of 4 different integers,each of which has a value between –5 and 10, inclusive?
- ~3 E; x& G5 n4 E. {0 ?. d5 q(A) - 5040
% }0 t/ y! K$ y0 K(B) - 3600# I+ m9 y& b( u. X& e$ ]6 J2 y
(C) - 720: O$ ~  s0 a; e$ j. K  i6 v+ v: m
(D) - 600
! |( ^; H6 q7 b; U6 R(E) - 120
- k; ^2 t1 T$ o0 l1 z9 DAns : B
. A) y  q% [0 e: I0 a. i5 p-3600=-5*8*9*10; Z0 Y4 ?9 F' O; O0 }- T
我觉得应该选A，5040=7*8*9*10不可能有负值，不知道between包不包括-5和10，不过如果这样算的话，-5040也不对; {* [. o4 t2 ^5 L6 B1 B4 Y# i
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5. A ranch has horses and ponies. Five-sixths of theponies have horseshoes. Half of the ponies with horseshoes are Icelandic. Ifthere are three more horses than ponies, what is the minimum number of horsesand ponies on the ranch?0 o  r. x5 S2 N9 I2 O
A. 12( ^/ {* Q# F, g, \* a- U
B. 15
9 H- j0 K) J0 Q; ~C. 27
7 V3 d# f7 u3 ]. t, JD. 486 i- s1 ^1 t5 g+ }7 d4 `
E. 54+ u# a9 K# ]/ M6 M
Ans: C
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不知道怎么算出来的，那位牛人来讲解一下- j  u6 `; l1 a# w3 ^8 {" T

- }  X4 Y! X7 t* U# K1 v: s& ^14. If x is from 1 to 100, for which function y is thestandard deviation maximum+ M$ k+ T& U2 q1 R% W5 x( u
a. y = x/2  v0 `; J/ q. a
b. y = x- 10) s  f8 F& L+ ]4 i
c. y = x1 P! x' V2 \6 \) D
d. y = x+10: r# N9 O2 Y. v6 f9 N
e. y = 2*x + 5
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这道不会，也没答案。。。救命啊。。。
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就这些，献丑了，bow!!!

10. the tax is 5% after discount.
* y  _2 a+ Q6 G- l5 eso it is 300*0.1+(300-300/75*25)*1.05=240

fountin：12/2=内径6，外径=6+2=8，Pi(8^2-6^2)*0.06=28*0.06=1.68pi，但不知道这是不是真的是答案。- f, f6 G- j( Q: F6 Z6 W: b$ H# N* U
lable：是说贴在圆柱上？那就没啥固定的关系吧？
2 M" N3 A  n7 {4 D俩方块那个换谁也算不出来4，肯定有问题8 A* P7 J1 P3 E! E8 i4 U
1.2^2=1.44，你说得对& [+ S7 ?/ v4 ~+ P' J
inclusive就是包含。但是7 8 9 10 都是正数，你要最小的应该是有奇数个负数，不然就负负得正了，所以应该是（-5）*8*9*10= -3600 ，即要求是负的又要绝对值最大。哦这个你好像算出来了，我觉得least possible看起来是最不可能的意思，不过也可能是写机经的人chingelish了一把大概应该是least value possible吧？
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& x' I$ U6 l* e/ l6 _horse多三个，减去三，除以二，在乘上六分之五，再除以二，是Icelandic的pony数目，这个数目要求是整数，只能总数27。你也可以这样算：一个数字乘以二再乘上1.2，是总共的pony个数，必须是整数，那么这个数字最少多少？能让1.2变整数的就是5，10，15，20，最小的五是奇数，就只能是十了，最后得到12*2+3=27
; S$ A; K& J* H1 D& r# z% `' P8 l4 ]7 s) ~9 |& J
这个函数的定义域是1-100，标准差的定义是<（y-<y>）^2>，<>代表平均值。这样五个函数都是线形函数，也就是说等概率分布。中间三个值域一样，所以偏差一样。最后一个值域最大，所以标准差最大。/ q; M4 |. ^" c+ P0 X' y  M$ C$ G
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不一定对啊，我说的。你自己再想想。0 A- @  w; D$ R8 l8 ~5 w

' v+ e5 p* S. L$ N& N: M) B[ 本帖最后由 午夜清风 于 2007-12-3 14:37 编辑 ]

另外我n久没上来看了，现在竟然把我的太傻元都扣干净了~~！！当年我还是暴富的……
1 O' D) _& i# W2 ~( }而且还有个年龄在那里写着~~我就担心我哪天岁数太大再嘎呗儿一下寿终正寝了咋办……

wideth=2是什么意思啊？谢谢

3.The area of rectangular region R is equal to thearea of rectangular region T.
- E. e: T1 V; `8 P) GThe Ratio of the length to the width of R is 3 to 1.( p' t4 f; P# g+ a
the length & width of T are 12 & W, respectively.! b+ `: {" t# V- {3 B
Col A : w% F7 J/ k& s0 |# {
Col B : 4
" O3 B) S1 Z' y7 H: FAns: C
; t  B5 g" `, P' F; Q7 z0 ?9 D- X5 Y# q- m
这道题PP3里有。。答案是D。。

width 就是FOUNTAIN 外墙的厚度,  所以这是一个内空圆柱体, 大圆面积减小圆面积就是整体的横截面积 然后水池深度是0.06米 其实意思好理解,只不过谁也不了解那个东西的构造而已.

width 就是FOUNTAIN 外墙的厚度,  所以这是一个内空圆柱体, 大圆面积减小圆面积就是整体的横截面积 然后水池深度是0.06米 其实意思好理解,只不过谁也不了解那个东西的构造而已.

10.There was a $25 discount on every purchase of $75there was a 10% charge on shipping which was added before the discount and 20% sales tax after the discount was added. If john paid total $300, whatwas the original amount of purchase if no sales tax was added per $75
9 F. p8 x7 I! m) p# ^: ?Ans : 240.2 c0 k2 C( q+ s  K) l+ b) T

, b! {$ M" d$ j1 [# J" b这道题没看明白，是说算原始价格吗？还是只算不加税的咩？
3 T9 j3 C8 V' @0 z如果只算不加税的，也应该是 300/（1+20%）=250...
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0 K7 F) v! j: T3 @8 d===============================================
9 E6 ^$ \; d+ {1 M这个是不是100*75% = 75，25discount
2 W/ F( K/ P6 e1 f+ u  N5 h$100*75%(discount) *1.2(sales tax) + 100*0.1(shipping fee) = 100
2 ?3 u+ e. G8 h* H5 k3 n( F所以300*80% = 240